相关文档

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-L&D

Iterating Block ciphers Definition A product cipher combines two or more transformations in a manner intending that the resulting cipher is more secure than the individual components. Definition An iterated block cipher is a block cipher involving the sequential repetition of an internal function called a round function. Parameters include the number of rounds Nr, the block bitsize n, and the bitsize k of the input key K from which Nr subkeys Ki (round keys) are derived. For invertibility (allowing unique decryption), for each value Ki the round function is a bijection on the round input.
团购合买资源类别:文库,文档格式:PPT,文档页数:63,文件大小:405KB
点击进入文档下载页(PPT格式)
点击下载(PPT格式)