Digital & Computing
What's up with Whatsapp - and should we weaken its security?
...open the box and read Alice’s message if he has a valid key of his own. But to be able to communicate with new users, you need a way of sharing keys that is still secure. To get over this, each user has what’s called a 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...