He is well known for his work on computer security and on programming languages, including his paper (with Michael Burrows and Roger Needham) on the Burrows-Abadi-Needham logic for analyzing authentication protocols, and his book (with Luca Cardelli) A Theory of Objects, laying out formal calculi for the semantics of object-oriented programming languages.
The cipher's designers were David Wheeler and Roger Needham of the Cambridge Computer Laboratory, and the algorithm was presented in an unpublished technical report in 1997 (Needham and Wheeler, 1997).
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