A 4-bit-wide block cipher model is presented. Given all 16 possible messages and their ciphertexts, the goal is to develop the table arrangements which are the cipher key. The tiny size is intended to support a deep understanding of strength, something which to date has been impossible in any full-size cipher. Related 6-bit and 8-bit versions are also mentioned, should the 4-bit version be in some way a special case.
Terry Ritter, his current address, and his top page.
Last updated: 1998-03-31