在密码学发展的历史上,1976年是一个值得纪念的年份.这一年,美国斯坦福大学年轻的数学家狄菲(Diffie)和计算机专家海尔曼(Hellman)联名发表了《密码学的新方向》一文,开创了现代密码学的新领域——公开密钥体制(简称公钥体制).30年来,公钥体制获得了巨大的发展,它不仅消解了传统的秘密密钥体制存在的一些困难, The year 1976 marks a memorable year in the history of cryptography, when Diffie, a young mathematician at Stanford University in the United States, co-wrote with computer scientist Hellman that “the new direction of cryptography ”, A new field of modern cryptography, the public key system (public key system) was created.30 years, the public key system has made tremendous development, it not only eliminates some of the difficulties of the traditional secret key system ,