Decoding and Encoding Interactives Reviewed by Teachers

Shodor Education Foundation

For Students 9th - 12th Standards

Caesar ciphers hide secret missives. A simple interactive lets users encode and decode hidden messages. The cipher method here is the Caesar shift.

Shodor Education Foundation

For Students 9th - 10th

Create your own affine cipher for encoding and decoding messages. Input your own constant and multiplier, then input a message to encode.