For the design of a compression function one can either start from scratch and build a function specific for the purpose of hashing or use existing cryptographic building blocks such as block ciphers.
通常设计压缩函数有两种方法：一、利用某些数学工具专为哈希目的而设计一个压缩函数，二、利用现有的密码算法如分组密码来作为压缩函数等。
The general structure of SAFER block ciphers adopts SP network. It's design has some original features.
SAFER系列密码算法的总体结构采用SP网络，它的设计具有其独到的几个特色。
The general structure of SAFER block ciphers adopts SP network. It's design has some original features. In this paper, the design technique of SAFER block cipher is analyzed.
SAFER系列密码算法的总体结构采用SP网络，它的设计具有其独到的几个特色。
The general structure of SAFER block ciphers adopts SP network. It's design has some original features. In this paper, the design technique of SAFER block cipher is analyzed.
SAFER系列密码算法的总体结构采用SP网络，它的设计具有其独到的几个特色。
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