MUST1——一种快速分组加密算法

信息安全无论在军事上还是在商业应用上都十分重要，美国的数据加密标准DES（Data Encryption Standard）是迄今世界上最广泛使用和流行的一种分组密码算法，但由于密钥太短已面临淘汰，本文中介绍一种分组密码-MUST1，它的明、密文都是128bit，密钥长256bit，同时从理论上证明了它的正确性，其抗攻击能力比DES更强，测试结果表明，MUST1是高效的，它的加密速度是DES的3倍，雪崩现象良好，良好利用MUST1构造出HASH函数，同样具有抗攻击能力强、效率高的特点。

MUST1——A Quick Block Cryptography

The information security is not only the concern of governments in the world,but also the private sector zealously guarded over their national cryptologic services.DES (Data Encryption Standard) has been widely used in many realms all over the world.However,it is close to the end of its life due to key length is too short.This paper is one of our researches:the block cipher--MUST1.Both the plaintext and ciphertext are 128 bit per block;the key legth is 256 bit.The validity has been proved in theory,and the unbreakable capability is much better than DES (the key length is 56 bits).From the result of the commissioning test,we observed that MUST1 is high effective,its encryption speed is 3 times faster than DES;the avalanche effect is excellent.At the same time,we designed a HASH function by adopting the construction of MUST1.The HASH function has the same characteristics as in MUST1.