authtication+protocal.pdf

通俗易懂的描述对称加密的原理，从最简单的加密方法开始，慢慢解释到需要认证机构的加密方式。 Authentication Protocols and Key Establishment • Like cryptographic algorithms, the design of an authentication algorithm requires a lot of skill and care – don't do this at home! • Using KDCs and CAs allows communication with unrelated peers – trusted intermediate • Performance considerations impact on the design of authentication algorithms • Randomness is both tricky to achieve and important for the result