Yesterday, WhatsApp enabled 'end-to-end encryption' for over a billion users. What does this mean for the average user? All data sent from User A to User B is encrypted, using keys that only the intended users have access to. These keys reside on the user's device only; therefore the data can not be decrypted by anyone else.
We can all agree that the implementation of encryption is fantastic! Ensuring that messages can not be intercepted by hackers.
“WhatsApp may retain date and time stamp information associated with successfully delivered messages and the mobile phone numbers involved in the messages, as well as any other information which WhatsApp is legally compelled to collect”
WhatsApp uses what’s called public key encryption: To send a message to User B, User A asks a WhatsApp server for a public key that applies to User B. User A then uses the public key to encrypt the message. User B’s private key—only available on User B’s phone—decrypts the message.