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Public Key Crypto Issues
nPublic keys need to be distributed
nSecret keys need to be kept secret
nPublic key cryptography is ÔslowÕ
nMath:
uThe security of the cryptosystem is based on a set of mathematical problems for which guessing a solution requires scanning a huge solution space (e.g. factorization)
uAlgorithms e.g.: DSA, RSA, elliptic curve
uRSA/SHA1 is a good choice
FBetter than RSA/MD5