Stafford Tavares: Difference between revisions
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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. | '''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. | ||
His main theoretical contribution is the '''strict avalanche criterion''' <ref name=SAC> {{citation | author = A. F. Webster and [[Stafford E. Tavares]] | title = On the design of S-boxes | journal = Advances in Cryptology - Crypto '85 (Lecture Notes in Computer Science) | date = 1985 }} </ref>. This is a strong version of the requirement for good [[Block cipher#Avalanche|avalanche properties]] in block ciphers; 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. | |||
Tavares was | Tavares has also made more practical contributions. He was [[Carlisle Adams]]' PhD thesis<ref>{{citation | ||
| author = C. M. Adams | |||
| title = A Formal and Practical Design Procedure for Substitution-Permutation Network Cryptosystems | |||
| publisher = Department of Electrical Engineering, Queen's University | |||
| date = 1990 }}</ref> supervisor in the work that led to the [[CAST (cipher)|CAST]] family of block ciphers. He has since done work <ref>{{citation | |||
| author = H.M. Heys and S.E. Tavares | |||
| title = On the Security of the CAST Encryption Algorithm | |||
| journal = Canadian Conference on Electrical & Computer Engineering | |||
| date = September 1994 }}</ref> on security analysis of those ciphers. | |||
== References == | == References == | ||
{{reflist}} | {{reflist}} | ||
Latest revision as of 21:41, 26 November 2010
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.
His main theoretical contribution is the strict avalanche criterion [1]. This is a strong version of the requirement for good avalanche properties in block ciphers; 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.
Tavares has also made more practical contributions. He was Carlisle Adams' PhD thesis[2] supervisor in the work that led to the CAST family of block ciphers. He has since done work [3] on security analysis of those ciphers.
References
- ↑ A. F. Webster and Stafford E. Tavares (1985), "On the design of S-boxes", Advances in Cryptology - Crypto '85 (Lecture Notes in Computer Science)
- ↑ C. M. Adams (1990), A Formal and Practical Design Procedure for Substitution-Permutation Network Cryptosystems, Department of Electrical Engineering, Queen's University
- ↑ H.M. Heys and S.E. Tavares (September 1994), "On the Security of the CAST Encryption Algorithm", Canadian Conference on Electrical & Computer Engineering