A flaw in the Whatsapp application would allow access to encrypted conversations. The British newspaper The Guardian revealed the case on Friday. It is more precisely a backdoor in English.
It is Tobias Boelter, a researcher in cryptography who made the discovery of this backdoor. It is thanks to this flaw that the application owned by Facebook is able to recover encrypted messages sent but not read.
Indeed, the encryption of the messages on Whatsapp is done thanks to the exchange of "keys" between two interlocutors. However, when a user disconnects and reconnects, he / she is assigned a new key. That's when the back door appears. Whatsapp can then decrypt messages sent but not yet read.
According to Tobias Boelter, the existence of this flaw could allow the authorities to ask Whatsapp for the archives of the conversations. This backdoor represents a gold mine for security agencies and for the government. However, it also represents a threat to the freedom of expression of the millions of users of the application.
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