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Xenon (cipher)

Designers Chang-Hyi Lee
First published 2000
Related to Zodiac
Cipher detail
Key sizes 128, 192, or 256 bits
Block sizes 128 bits
Structure Feistel network
Rounds 16

In cryptography, Xenon is a block cipher designed in the year 2000 by Chang-Hyi Lee for the Korean firm SoftForum.

The algorithm uses a key size of 128, 192, or 256 bits. It operates on blocks of 128 bits using a 16-round Feistel network structure with key whitening. Designed for speed, Xenon's round function does not use any S-boxes. The only operations it uses are XOR, addition, multiplication, and bit shifts.


Further reading

  • Toshio TOKITA and Mitsuru MATSUI (1 January 2003). "Linear Cryptanalysis of Block Cipher Xenon". IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences. E86-A (1): 13–18.