Stafford Tavares
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Stafford E. Tavares is a cryptographer who teaches at Queens University in Canada. His specialty is block cipher design and analysis; he has published extensively in that area.
Tavares was Carlisle Adams' PhD thesis[1] supervisor in the work that led to the CAST family of block ciphers.
Tavares was one of the proposers of the strict avalanche criterion [2]. This is a strong version of the requirement for good avalanche properties. Complementing any single bit of the input or the key should give exactly a 50% chance of a change in any given bit of output.
References
- ↑ C. M. Adams (1990), A Formal and Practical Design Procedure for Substitution-Permutation Network Cryptosystems, Department of Electrical Engineering, Queen's University
- ↑ A. F. Webster and Stafford E. Tavares (1985), "On the design of S-boxes", Advances in Cryptology - Crypto '85 (Lecture Notes in Computer Science)