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公钥密码体制是1976年由笛费(Diffie),海尔曼(Hellman)以及默克勒(Merkle)提出的新型密码体制,是对传统密码体制的重大突破.一、提出公钥密码体制的背景和基本思路传统密码体制的一个基本缺点是,在任何密文未发送之前,发方和收方之间必须利用安全通道,预先进行通信,将解密密钥通知对方.在实际应用中这是非常困难的.在战争年代,传送密码的人可能被敌方识破,密码也可能被敌方截获.
The public key cryptosystem is a new cryptosystem proposed by Diffie, Hellman and Merkle in 1976. It is a major breakthrough for the traditional cryptosystem. First, it proposes the background of the public key cryptosystem. A basic drawback of traditional cryptosystems is that before any ciphertext is sent, the sender and the receiver must use secure channels to communicate in advance and inform each other of the decryption key. In practice, this is very Difficult. During the war years, the person who transmitted the password may be seen by the enemy and the password may be intercepted by the enemy.