{"id":63,"count":73,"description":"
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Whatsapp<\/a>, a flaw endangers group chats<\/h1>\r\n

From a study conducted by researchers at the Ruhr University in Bochum, hackers can add people to group chats on WhatsApp.<\/h2>\r\n<\/div>\r\n
\r\n\r\nIn the years\u00a0Whatsapp<\/strong>\u00a0has invested heavily in user data security. It introduced two-factor authentication and end-to-end encryption of conversations thanks to Open Whisper Systems. This last decision, in particular, has improved privacy and protected against hackers. The breakthrough of introducing end-to-end encryption within the application has been welcomed by both users and experts. The use of\u00a0end-to-end encryption<\/strong>\u00a0it should suggest that user data is safe and that no one can intrude on their conversations. But in reality it is not so. This is what emerges from research conducted\u00a0from the Ruhr University of Bochum<\/strong>\u00a0(in Germany) who discovered the presence of a\u00a0do it inside the WhatsApp servers.<\/strong>\r\n

What the researchers found<\/strong><\/h2>\r\nThe study was presented at the Real World Crypto security conference and immediately generated a lot of buzz. The research uncovered vulnerabilities in three instant messaging apps:\u00a0WhatsApp, Signal and Threema<\/strong>. While the problems encountered in the last two apps are easy to fix, the\u00a0WhatsApp bug<\/strong>\u00a0it would potentially endanger all group conversations. According to the researchers, a flaw would allow everyone with access to WhatsApp servers to add people to group conversations, without asking the administrators for consent. Due to this bug, hackers could enter chats without anyone noticing and start collecting user data.\r\n
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What hackers can do<\/strong><\/div>\r\n<\/div>\r\n<\/div>\r\nAccess to WhatsApp servers would allow hackers to have absolute control over group conversations. When you add someone to a chat, a message appears inside the chat, warning other users. If an attacker was adding the user through tampering at the server level, a group administrator may warn other users that he has not added anyone. But if the group is very active, the message of adding a new user may escape in 99% of cases. By controlling the servers directly, hackers also have other powers. For example, they can decide which messages to show in the chat and also send different messages to group administrators. In this way, the intrusion goes almost unnoticed and the attackers can safely collect people's data.\r\n

Whatsapp <\/a>on alert<\/strong><\/h2>\r\nResearchers at the University of Ruhr said they warned WhatsApp in July last year, but the staff of the instant messaging application did not consider the bug important enough to deserve the cash reward that Facebook offers to all those who discover a do it on one of its platforms. Some WhatsApp employees have confirmed the problem to Wired, but have emphasized the fact that when adding a new member in a chat, all users are warned via a message. And this would secure user data.\r\n

How to solve the problem<\/strong><\/h2>\r\nAccording to scholars, the problem could be solved easily, it would be enough for WhatsApp to make a simple modification. Add some sort of two-factor authentication to add a user to a new group: a key owned only by the group administrator. 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