Maintaining Privacy

To keep information private it must be hidden from “prying” computers As children, most of us used “secret” codes Most often the code was a Caesar Cipher -- an alphabetic shift by a constant amount

Clear Text:   ABCDEFGHIJKLMNOPQRSTUVWXYZ

Encode

Decode

Coded Text:   IJKLMNOPQRSTUVWXYZABCDEFGH

VW EIZ QV QZIY