信息安全技术是现代计算机通信网络的基础，而现代密码算法又是信息安全最为核心的部分。本课程以整个公钥密码发展为线索，从数论中的难解问题出发，系统地介绍各种基本的现代密码算法，包括基于证书的RSA算法，Rabin算法，ElGamal算法及其推广等，和基于身份的公钥密码算法等。同时引导学生如何应用这些基本的密码算法去构造实际应用中的复杂的公钥加密和数字签名方案。最后，通过对国内外密码学最新进展的介绍，使学生切实感受现代密码算法在实际应用中的迫切性以及今后发展的趋势。通过这门课程的学习，学生在实践上可以掌握设计现代密码算法的各种基本原则和方法。在理论上可以把握现代密码算法的方向，深入研究现代密码算法的前沿性工作。

Information security is the basis of modern computer communication network, while modern cryptographic algorithm is also the core part of the information security. This course, clued with the whole development of public key cryptography, started from the hard problems in number theory, systematically introduces all basic modern cryptographic algorithms, including the certificate based RSA algorithm, Rabin algorithm, ElGamal algorithm and their extensions, the identity based public key cryptographic algorithms and so on. At the same time, this course also leads students to how to use these basic cryptographic algorithms to construct complexity public key encryption and digital signature schemes in practical applications. In the end, by introducing the newest advances in both foreign and domestic cryptographic researches, this course also help students to feel the modern cryptographic algorithms on its impendency in current practical applications and its tendency in future development.By learning this course, the students can not only master all basic principals and methods to design modern cryptographic algorithm in practice, but also grasp the direction of modern cryptography in theory, and deeply study the open problems in modern cryptography.