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WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
 This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2010) (Learn how and when to remove this template message)
In computer science, session hijacking, sometimes also known as cookie hijacking is the exploitation of a valid computer session—sometimes also called a session key—to gain unauthorized access to information or services in a computer system. In particular, it is used to refer to the theft of a magic cookie used to authenticate a user to a remote server. It has particular relevance to web developers, as the HTTP cookies[1] used to maintain a session on many web sites can be easily stolen by an attacker using an intermediary computer or with access to the saved cookies on the victim's computer (see HTTP cookie theft).

A popular method is using source-routed IP packets. This allows an attacker at point B on the network to participate in a conversation between A and C by encouraging the IP packets to pass through B's machine.

If source-routing is turned off, the attacker can use "blind" hijacking, whereby it guesses the responses of the two machines. Thus, the attacker can send a command, but can never see the response. However, a common command would be to set a password allowing access from somewhere else on the net.
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An attacker can also be "inline" between A and C using a sniffing program to watch the conversation
 This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2010) (Learn how and when to remove this template message)
In computer science, session hijacking, sometimes also known as cookie hijacking is the exploitation of a valid computer session—sometimes also called a session key—to gain unauthorized access to information or services in a computer system. In particular, it is used to refer to the theft of a magic cookie used to authenticate a user to a remote server. It has particular relevance to web developers, as the HTTP cookies[1] used to maintain a session on many web sites can be easily stolen by an attacker using an intermediary computer or with access to the saved cookies on the victim's computer (see HTTP cookie theft).

A popular method is using source-routed IP packets. This allows an attacker at point B on the network to participate in a conversation between A and C by encouraging the IP packets to pass through B's machine.

If source-routing is turned off, the attacker can use "blind" hijacking, whereby it guesses the responses of the two machines. Thus, the attacker can send a command, but can never see the response. However, a common command would be to set a password allowing access from somewhere else on the net.
Methods to prevent session hijacking include:

Encryption of the data traffic passed between the parties by using SSL/TLS; in particular the session key (though ideally all traffic for the entire session[11]). This technique is widely relied-upon by web-based banks and other e-commerce services, because it completely prevents sniffing-style attacks. However, it could still be possible to perform some other kind of session hijack. In response, scientists from the Radboud University Nijmegen proposed in 2013 a way to prevent session hijacking by correlating the application session with the SSL/TLS credentials[12]
Use of a long random number or string as the session key. This reduces the risk that an attacker could simply guess a valid session key through trial and error or brute force attacks.
Regenerating the session id after a successful login. This prevents session fixation because the attacker does not know the session id of the user after s/he has logged in.
Some services make secondary checks against the identity of the user. For instance, a web server could check with each request made that the IP address of the user matched the one last used during that session. This does not prevent attacks by somebody who shares the same IP address, however, and could be frustrating for users whose IP address is liable to change during a browsing session.
Alternatively, some services will change the value of the cookie with each and every request. This dramatically reduces the window in which an attacker can operate and makes it easy to identify whether an attack has taken place, but can cause other technical problems (for example, two legitimate, closely timed requests from the same client can lead to a token check error on the server).
Users may also wish to log out of websites whenever they are finished using them.[13][14] However this will not protect against attacks such as Firesheep.
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An attacker can also be "inline" between A and C using a sniffing program to watch the conversation
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries

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WhatsApp Customer contact phone number for tech support phone number is +1 877 220 7407 for united state and other countries
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WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
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WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
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WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Messenger is a freeware, cross-platform and end-to-end encrypted instant messaging application for smartphones.[10] It uses the Internet to make voice calls, one to one video calls; send text messages, images, GIF, videos, documents, user location, audio files, phone contacts and voice notes[11][12] to other users using standard cellular mobile numbers. It also incorporates a feature called Status, which allows users to upload photos and videos to a 24-hours-lifetime feed that, by default, are visible to all contacts, similar to Snapchat, Facebook and Instagram Stories.

WhatsApp Inc., based in Mountain View, California, was acquired by Facebook in February 2014 for approximately US$19.3 billion.[13][14] By February 2016, WhatsApp had a user base of over one billion,[15][16] making it the most popular messaging application at the time.

WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo! . After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.[18] At one point they applied for jobs at Facebook but were rejected.[18] For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss ".... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on RentACoder.com, Igor Solomennikov, and introduced him to Koum. Koum named the app "WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]

In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18] WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18] In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18] After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]

WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]

In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.[19][20][21]

By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.[18]

In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.[22] As of April 22, 2014, WhatsApp had over 500 million monthly active users, 700 million photos and 100 million videos were being shared daily, and the messaging system was handling more than 10 billion messages each day.[23] On August 24, 2014, Koum announced on his Twitter account that WhatsApp had over 600 million active users worldwide. At that point WhatsApp was adding about 25 million new users every month, or 833,000 active users per day.[24][25] With 65 million active users representing 10% of the total worldwide users, India has the largest number of consumers.

WhatsApp Messenger is a freeware, cross-platform and end-to-end encrypted instant messaging application for smartphones.[10] It uses the Internet to make voice calls, one to one video calls; send text messages, images, GIF, videos, documents, user location, audio files, phone contacts and voice notes[11][12] to other users using standard cellular mobile numbers. It also incorporates a feature called Status, which allows users to upload photos and videos to a 24-hours-lifetime feed that, by default, are visible to all contacts, similar to Snapchat, Facebook and Instagram Stories.

WhatsApp Inc., based in Mountain View, California, was acquired by Facebook in February 2014 for approximately US$19.3 billion.[13][14] By February 2016, WhatsApp had a user base of over one billion,[15][16] making it the most popular messaging application at the time.

WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo! . After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.[18] At one point they applied for jobs at Facebook but were rejected.[18] For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss ".... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on RentACoder.com, Igor Solomennikov, and introduced him to Koum. Koum named the app

"WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]

In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18] WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18] In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18] After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]

WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]

In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.[19][20][21]

By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.[18]


In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.[22] As of April 22, 2014, WhatsApp had over 500 million monthly active users, 700 million photos and 100 million videos were being shared daily, and the messaging system was handling more than 10 billion messages each day.[23] On August 24, 2014, Koum announced on his Twitter account that WhatsApp had over 600 million active users worldwide. At that point WhatsApp was adding about 25 million new users every month, or 833,000 active users per day.[24][25] With 65 million active users representing 10% of the total worldwide users, India has the largest number of consumers.
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WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country.

click and watch this video
like subscribe and share


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We believe that your chats are very important, and we work hard to make sure that you never lose them. However, in the case that they are deleted or lost for any reason, we cannot help you recover the messages because we do not store your WhatsApp chat history in our system.
To solve the problem of losing WhatsApp chat history, you can restore it from the WhatsApp backup itself or turn to the third-party software- Android Data Recovery for help. Remember! Don't operate your Android phone or update anything once you find out that you lost the important data and want to recover it. Otherwise, your backup file will be overwritten and what you deleted by mistake can n

ot be extracted back any longer.
1. The backup copy of WhatsApp Messages is only valid for 7 days. So you should import your files before the deadline.
2. If you never back up before, you are not able to restore the data when accidentally delete.
3. It doesn’t allow you to select recover the data selectively and you need to restore the whole files on the backup copy, even some of them are useless.
If you fail to recover the WhatsApp messages manually, please continue to read and you are recommended to recover data with Android Data Recovery software.
WhatsApp is a well-known messaging app available for Android, iPhone, and Windows Phone. It provides us a convenient method to chat for free with families, friends and workmates. As smartphone gets a smart responsive touch screen, the WhatsApp chats and media are apt to be deleted by mistake. How to recover deleted WhatsApp messages on Android devices? Please check the solutions mentioned below:




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https://www.youtube.com/watch?v=lndIIm0D0tk&t=4s


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WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo!. After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.
[18]
At one point they applied for jobs at Facebook but were rejected.
[18]
For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss "... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on Freelancer - Hire & Find Jobs, Igor Solomennikov, and introduced him to Koum. Koum named the app "WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]
whatsapp customer service phone number +1 877 22O 74O7whatsapp customer service phone number +1 877 22O 74O7whatsapp customer service phone number +1 877 22O 74O7whatsapp customer service phone number +1 877 22O 74O7In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18]WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18]In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18]After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.
[19]
[20]
[21]
By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.


[18]


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WhatsApp Messenger is a freeware, cross-platform and end-to-end encrypted instant messaging application for smartphones.[10] It uses the Internet to make voice calls, one to one video calls; send text messages, images, GIF, videos, documents, user location, audio files, phone contacts and voice notes[11][12] to other users using standard cellular mobile numbers. It also incorporates a feature called Status, which allows users to upload photos and videos to a 24-hours-lifetime feed that, by default, are visible to all contacts; similar to Snapchat, Facebook and Instagram Stories.
WhatsApp Inc., based in Mountain View, California, was acquired by Facebook in February 2014 for approximately US$19.3 billion.[13][14] By February 2016, WhatsApp had a user base of over one billion,[15][16] making it the most popular messaging application at the time.[16][17]
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2009–2014
WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo!. After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.[18] At one point they applied for jobs at Facebook but were rejected.[18] For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss "... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on RentACoder.com, Igor Solomennikov, and introduced him to Koum. Koum named the app "WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]
In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18] WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18] In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18] After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]
WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]
In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.[19][20][21]
By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.[18]
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In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.[22] As of April 22, 2014, WhatsApp had over 500 million monthly active users, 700 million photos and 100 million videos were being shared daily, and the messaging system was handling more than 10 billion messages each day.[23] On August 24, 2014, Koum announced on his Twitter account that WhatsApp had over 600 million active users worldwide. At that point WhatsApp was adding about 25 million new users every month, or 833,000 active users per day.[24][25] With 65 million active users representing 10% of the total worldwide users, India has the largest number of consumers.[26]
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WhatsApp customer service helpline toll-free phone number is +1 877 220 7407 for united state and other countries

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WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
WhatsApp customer service helpline toll-free phone  number is +1 877 22O 74O7 for united state and other countries
 This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2010) (Learn how and when to remove this template message)
In computer science, session hijacking, sometimes also known as cookie hijacking is the exploitation of a valid computer session—sometimes also called a session key—to gain unauthorized access to information or services in a computer system. In particular, it is used to refer to the theft of a magic cookie used to authenticate a user to a remote server. It has particular relevance to web developers, as the HTTP cookies[1] used to maintain a session on many web sites can be easily stolen by an attacker using an intermediary computer or with access to the saved cookies on the victim's computer (see HTTP cookie theft).

A popular method is using source-routed IP packets. This allows an attacker at point B on the network to participate in a conversation between A and C by encouraging the IP packets to pass through B's machine.

If source-routing is turned off, the attacker can use "blind" hijacking, whereby it guesses the responses of the two machines. Thus, the attacker can send a command, but can never see the response. However, a common command would be to set a password allowing access from somewhere else on the net.
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An attacker can also be "inline" between A and C using a sniffing program to watch the conversation
 This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2010) (Learn how and when to remove this template message)
In computer science, session hijacking, sometimes also known as cookie hijacking is the exploitation of a valid computer session—sometimes also called a session key—to gain unauthorized access to information or services in a computer system. In particular, it is used to refer to the theft of a magic cookie used to authenticate a user to a remote server. It has particular relevance to web developers, as the HTTP cookies[1] used to maintain a session on many web sites can be easily stolen by an attacker using an intermediary computer or with access to the saved cookies on the victim's computer (see HTTP cookie theft).

A popular method is using source-routed IP packets. This allows an attacker at point B on the network to participate in a conversation between A and C by encouraging the IP packets to pass through B's machine.

If source-routing is turned off, the attacker can use "blind" hijacking, whereby it guesses the responses of the two machines. Thus, the attacker can send a command, but can never see the response. However, a common command would be to set a password allowing access from somewhere else on the net.
Methods to prevent session hijacking include:

Encryption of the data traffic passed between the parties by using SSL/TLS; in particular the session key (though ideally all traffic for the entire session[11]). This technique is widely relied-upon by web-based banks and other e-commerce services, because it completely prevents sniffing-style attacks. However, it could still be possible to perform some other kind of session hijack. In response, scientists from the Radboud University Nijmegen proposed in 2013 a way to prevent session hijacking by correlating the application session with the SSL/TLS credentials[12]
Use of a long random number or string as the session key. This reduces the risk that an attacker could simply guess a valid session key through trial and error or brute force attacks.
Regenerating the session id after a successful login. This prevents session fixation because the attacker does not know the session id of the user after s/he has logged in.
Some services make secondary checks against the identity of the user. For instance, a web server could check with each request made that the IP address of the user matched the one last used during that session. This does not prevent attacks by somebody who shares the same IP address, however, and could be frustrating for users whose IP address is liable to change during a browsing session.
Alternatively, some services will change the value of the cookie with each and every request. This dramatically reduces the window in which an attacker can operate and makes it easy to identify whether an attack has taken place, but can cause other technical problems (for example, two legitimate, closely timed requests from the same client can lead to a token check error on the server).
Users may also wish to log out of websites whenever they are finished using them.[13][14] However this will not protect against attacks such as Firesheep.
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An attacker can also be "inline" between A and C using a sniffing program to watch the conversation
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WhatsApp Messenger is a freeware, cross-platform and end-to-end encrypted instant messaging application for smartphones.[10] It uses the Internet to make voice calls, one to one video calls; send text messages, images, GIF, videos, documents, user location, audio files, phone contacts and voice notes[11][12] to other users using standard cellular mobile numbers. It also incorporates a feature called Status, which allows users to upload photos and videos to a 24-hours-lifetime feed that, by default, are visible to all contacts, similar to Snapchat, Facebook and Instagram Stories.

WhatsApp Inc., based in Mountain View, California, was acquired by Facebook in February 2014 for approximately US$19.3 billion.[13][14] By February 2016, WhatsApp had a user base of over one billion,[15][16] making it the most popular messaging application at the time.

WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo! . After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.[18] At one point they applied for jobs at Facebook but were rejected.[18] For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss ".... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on RentACoder.com, Igor Solomennikov, and introduced him to Koum. Koum named the app "WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]

In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18] WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18] In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18] After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]

WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]

In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.[19][20][21]

By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.[18]

In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.[22] As of April 22, 2014, WhatsApp had over 500 million monthly active users, 700 million photos and 100 million videos were being shared daily, and the messaging system was handling more than 10 billion messages each day.[23] On August 24, 2014, Koum announced on his Twitter account that WhatsApp had over 600 million active users worldwide. At that point WhatsApp was adding about 25 million new users every month, or 833,000 active users per day.[24][25] With 65 million active users representing 10% of the total worldwide users, India has the largest number of consumers.

WhatsApp Messenger is a freeware, cross-platform and end-to-end encrypted instant messaging application for smartphones.[10] It uses the Internet to make voice calls, one to one video calls; send text messages, images, GIF, videos, documents, user location, audio files, phone contacts and voice notes[11][12] to other users using standard cellular mobile numbers. It also incorporates a feature called Status, which allows users to upload photos and videos to a 24-hours-lifetime feed that, by default, are visible to all contacts, similar to Snapchat, Facebook and Instagram Stories.

WhatsApp Inc., based in Mountain View, California, was acquired by Facebook in February 2014 for approximately US$19.3 billion.[13][14] By February 2016, WhatsApp had a user base of over one billion,[15][16] making it the most popular messaging application at the time.

WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo! . After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.[18] At one point they applied for jobs at Facebook but were rejected.[18] For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss ".... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on RentACoder.com, Igor Solomennikov, and introduced him to Koum. Koum named the app

"WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]

In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18] WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18] In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18] After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]

WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]

In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.[19][20][21]

By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.[18]


In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.[22] As of April 22, 2014, WhatsApp had over 500 million monthly active users, 700 million photos and 100 million videos were being shared daily, and the messaging system was handling more than 10 billion messages each day.[23] On August 24, 2014, Koum announced on his Twitter account that WhatsApp had over 600 million active users worldwide. At that point WhatsApp was adding about 25 million new users every month, or 833,000 active users per day.[24][25] With 65 million active users representing 10% of the total worldwide users, India has the largest number of consumers.
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WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country
WhatsApp Customer contact phone number is +1 877 22O 74O7 for united state and other country.

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We believe that your chats are very important, and we work hard to make sure that you never lose them. However, in the case that they are deleted or lost for any reason, we cannot help you recover the messages because we do not store your WhatsApp chat history in our system.
To solve the problem of losing WhatsApp chat history, you can restore it from the WhatsApp backup itself or turn to the third-party software- Android Data Recovery for help. Remember! Don't operate your Android phone or update anything once you find out that you lost the important data and want to recover it. Otherwise, your backup file will be overwritten and what you deleted by mistake can n

ot be extracted back any longer.
1. The backup copy of WhatsApp Messages is only valid for 7 days. So you should import your files before the deadline.
2. If you never back up before, you are not able to restore the data when accidentally delete.
3. It doesn’t allow you to select recover the data selectively and you need to restore the whole files on the backup copy, even some of them are useless.
If you fail to recover the WhatsApp messages manually, please continue to read and you are recommended to recover data with Android Data Recovery software.
WhatsApp is a well-known messaging app available for Android, iPhone, and Windows Phone. It provides us a convenient method to chat for free with families, friends and workmates. As smartphone gets a smart responsive touch screen, the WhatsApp chats and media are apt to be deleted by mistake. How to recover deleted WhatsApp messages on Android devices? Please check the solutions mentioned below:




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WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo!. After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.
[18]
At one point they applied for jobs at Facebook but were rejected.
[18]
For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss "... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on Freelancer - Hire & Find Jobs, Igor Solomennikov, and introduced him to Koum. Koum named the app "WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]
whatsapp customer service phone number +1 877 22O 74O7whatsapp customer service phone number +1 877 22O 74O7whatsapp customer service phone number +1 877 22O 74O7whatsapp customer service phone number +1 877 22O 74O7In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18]WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18]In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18]After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.
[19]
[20]
[21]
By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.


[18]


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WhatsApp Messenger is a freeware, cross-platform and end-to-end encrypted instant messaging application for smartphones.[10] It uses the Internet to make voice calls, one to one video calls; send text messages, images, GIF, videos, documents, user location, audio files, phone contacts and voice notes[11][12] to other users using standard cellular mobile numbers. It also incorporates a feature called Status, which allows users to upload photos and videos to a 24-hours-lifetime feed that, by default, are visible to all contacts; similar to Snapchat, Facebook and Instagram Stories.
WhatsApp Inc., based in Mountain View, California, was acquired by Facebook in February 2014 for approximately US$19.3 billion.[13][14] By February 2016, WhatsApp had a user base of over one billion,[15][16] making it the most popular messaging application at the time.[16][17]
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2009–2014
WhatsApp, was incorporated in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo!. After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America as a break from work.[18] At one point they applied for jobs at Facebook but were rejected.[18] For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In January 2009, after purchasing an iPhone and realizing that the App Store would soon create an industry of apps, Koum started visiting his friend Alex Fishman in West San Jose where the three would discuss "... having statuses next to individual names of the people", but this was not possible without an iPhone developer. Fishman found a Russian developer on RentACoder.com, Igor Solomennikov, and introduced him to Koum. Koum named the app "WhatsApp" to sound like "what's up". On February 24, 2009, he incorporated WhatsApp Inc. in California. However, because early versions of WhatsApp often crashed or got stuck at a particular point, Koum felt like giving up and looking for a new job, upon which Acton encouraged him to wait for a "few more months".[18]
In June 2009, Apple launched push notifications, allowing users to be pinged when they were not using an app. Koum changed WhatsApp so that when a user's status is changed, everyone in the user's network would be notified.[18] WhatsApp 2.0 was released with a messaging component and the number of active users suddenly increased to 250,000. Acton was still unemployed and managing another startup, and he decided to join the company.[18] In October 2009, Acton persuaded five former friends in Yahoo! to invest $250,000 in seed funding, and Acton became a co-founder and was given a stake. He officially joined on November 1.[18] After months at beta stage, the application eventually launched in November 2009 exclusively on the App Store for the iPhone. Koum then hired a friend who lived in Los Angeles, Chris Peiffer, to develop the BlackBerry version, which arrived two months later.[18]
WhatsApp was switched from a free to paid service to avoid growing too fast, mainly because the primary cost was sending verification texts to users. In December 2009, the ability to send photos was added to WhatsApp for the iPhone. By early 2011, WhatsApp was one of the top 20 apps in Apple's U.S. App Store.[18]
In April 2011, Sequoia Capital was the only venture investor in WhatsApp and paid approximately $8 million for more than 15 percent of the company, after months of negotiation with Sequoia partner Jim Goetz.[19][20][21]
By February 2013, WhatsApp had about 200 million active users and 50 staff members. Sequoia invested another $50 million, and WhatsApp was valued at $1.5 billion.[18]
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In a December 2013 blog post, WhatsApp claimed that 400 million active users use the service each month.[22] As of April 22, 2014, WhatsApp had over 500 million monthly active users, 700 million photos and 100 million videos were being shared daily, and the messaging system was handling more than 10 billion messages each day.[23] On August 24, 2014, Koum announced on his Twitter account that WhatsApp had over 600 million active users worldwide. At that point WhatsApp was adding about 25 million new users every month, or 833,000 active users per day.[24][25] With 65 million active users representing 10% of the total worldwide users, India has the largest number of consumers.[26]
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