三大密码体制:对称密码、公钥密码和量子密码的理论与技术

随着信息技术的飞速发展，信息安全与通信保密日益重要与突出，密码技术是信息安全技术的核心。文中概括介绍了国内外三大密码体制(对称密码、公钥密码和量子密码)的理论与技术及其现状，分析了它们的发展趋势，重点探讨了分组密码的主要设计技术和量子密钥的产生与分发，最后对三大体制进行了比较。

Survey on the Cryptography of Symmetry, Public-key and Quantum

With the rapid development of IT, information and communication security become more and more important. Cryptographic technique is the core of information security technology. This paper first introduces summarily the three cryptosystem'(Symmetry, Public-key and Quantum ciphers) theory & technology and their status quos, and analyzes their developmental trends. Second, the thesis approaches emphatically primary design philosophy of block cipher and generation & distribution of quantum key. Finally, the comparison between the three cryptosystems is outlined.