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中国矿业大学:《密码学》课程教学资源(PPT讲稿)认证协议(Authentication Protocol)Block ciphers-DES

Originally designed to be efficient in hardware . A LOT of money has been invested in hardware. although DES standard is public there was considerable controversy over design – in choice of 56-bit key (vs Lucifer 128-bit) – and because design criteria were classified
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