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