2004年与2005年是中国密码学界值得自豪的两年,一直在国际上广泛应用的两大密码算法MD5、SHA—1,宣布被中国密码专家破解,一时间国际密码学领域风起云涌.MD5与SHA—1算法是目前国际电子签名及许多其他密码应用领域的关键技术,广泛应用于金融、证券等电子商务领域.其中,SHA—1算 2004 and 2005 are two years of pride in China’s cryptology field. MD5 and SHA-1, the two widely used cryptographic algorithms in the world, have been declared cracked by Chinese cryptographic experts and surged in the field of international cryptography for a time. -1 algorithm is the key technology in the field of international electronic signatures and many other cryptographic applications and is widely used in the fields of e-commerce such as finance and securities, among which SHA-1