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- 1949, Claude Shannon
- Father of mathematical cryptography
- information-theoretic security
- perfect secrecy
- key equivocation
- complexity theoretic security (!)
...we may construct our cipher in such a way that breaking it is
equivalent to (or requires at some point in the process) the solution
of some problem known to be laborious.
- simple design principles
Kevin McCurley
1/23/1998