Digital & Computing
What's up with Whatsapp - and should we weaken its security?
...public key that is available to anyone and proves the identity of the user, and a private key that stays with the user. Alice uses Bob’s public key to lock the box, but it can only be unlocked with Bob’s private key. WhatsApp’s system adds a further level of encryption, known as “perfect forward secrecy”. This is like a second lock with a key that changes for...