密码技术是信息安全的核心技术,是网络空间安全的基石.随着互联网的普及和信息技术的迅猛发展,密码学的重要性日益凸显.早期的密码学仅用于军事外交等少数机要通信的应用场景,所使用的密码算法也主要集中于流密码等对称密码算法.直到1976年,Diffie和Hellman在《密码学的新方向》中首次提出了公钥密码的思想,开启了密码学的新时代.经过40余年的发展,公钥密码算法取得了巨大成功,诸多 Cryptography is the core technology of information security and the cornerstone of cyberspace security.With the popularity of the Internet and the rapid development of information technology, the importance of cryptography has become increasingly prominent.Early cryptography is only used for a few minor communications such as military diplomacy , And the cryptographic algorithms used mainly focus on the symmetric cryptographic algorithms such as stream cipher etc. Until 1976, Diffie and Hellman first proposed the idea of ​​public key cryptography in the “New Direction of Cryptography” New Age. After more than 40 years of development, public key cryptography has achieved great success