For example, a key value of three would change the plaintext message “see you tonight” to the ciphertext message “vhh brx wrqljkw”. To decrypt the message, the process is reversed.

For example, a key value of 3 would change the plaintext message “see you tonight” to the ciphertext message “vhh brx wrqljkw”. To decrypt the message, the process is reversed. Firewalls ...

“I love turnarounds,” he says. This is an essay from the latest edition of Steven Levy's Plaintext newsletter. SIGN UP for Plaintext to read the whole thing, and tap Steven's unique insights ...