““Here’s why I keep changing identities. First, they don’t have to decrypt the message to get information if they see patterns in our correspondence—it would be useful for them to know the frequency and timing of our correspondence and the length of our messages. Second, they don’t have to decrypt the whole message, they only have to guess our encrypt and decrypt codes. Which I bet you have written down somewhere because you don’t actually care whether I get killed because you’re too lazy to memorize. Of course I mean that in the nicest possible way, O right honorable Mr. Hegemon.””
