From Wikipedia, the free encyclopedia
DesignersJoan Daemen
First published1994
Related to3-Way
Cipher detail
Key sizes192 bits
Block sizes192 bits
StructureSubstitution–permutation network
Best public cryptanalysis
related-key attack, power analysis

In cryptography, BaseKing is a block cipher designed in 1994 by Joan Daemen. It is very closely related to 3-Way, as the two are variants of the same general cipher technique.

BaseKing has a block size of 192 bits–twice as long as 3-Way, and notably not a power of two as with most block ciphers. The key length is also 192 bits. BaseKing is an 11-round substitution–permutation network.

In Daemen's doctoral dissertation he presented an extensive theory of block cipher design, as well as a rather general cipher algorithm composed of a number of invertible transformations that may be chosen with considerable freedom. He discussed the security of this general scheme against known cryptanalytic attacks, and gave two specific examples of ciphers consisting of particular choices for the variable parameters. These ciphers are 3-Way and BaseKing.

BaseKing is susceptible to the same kind of related-key attack as 3-Way. Daemen, Peeters, and Van Assche have also demonstrated potential vulnerabilities to differential power analysis, along with some techniques to increase the resistance of a given implementation of BaseKing to such an attack.


  • Joan Daemen (1994). "Cipher and Hash Function Design: Strategies based on linear and differential cryptanalysis (Ph.D. dissertation), chapter 7". Katholieke Universiteit Leuven. Archived from the original (gzipped PostScript) on 11 December 2006. Retrieved 16 February 2007. {{cite journal}}: Cite journal requires |journal= (help)
  • Joan Daemen; Michael Peeters; Gilles Van Assche (2000). Bitslice Ciphers and Power Analysis Attacks (PDF/PostScript). 7th International Workshop on Fast Software Encryption (FSE 2000). New York City: Springer-Verlag. pp. 134–149. Retrieved 16 February 2007.