Zcipher Algorithm

Zcipher is a symmetric encryption algorithm I made few years ago. It is a 64-bit block cipher with a 128-bit key. Zcipher is not patented and public domain.

Please note that it is a toy cipher, not a serious replacement for AES, Twofish, RC6 or any other industry-acknowledged decent cipher.

Download

the algorithm specification at the Cryptology ePrint Archive
zcipher.c - reference implementation in C (1614 bytes)
test.c - test application and usage sample

Updated on Dec 7, 2007

I have updated the codebook section of Appendix A in the algorithm specification document with the cryptovariable value for clarity.

Public Talk

I have presented Zcipher at the rump session during the Asiacrypt 2007 conference, which was held in Kuching, Sarawak, Malaysia.

Here are the presentation slides (pdf, 50Kb) and the photo (courtesy of Raphael Phan).

cryptography, source code, cipher, algorithm, research, experimental, fun, presentation, talks