公钥密码系统是现代密码学最重要的研究课题之一。
Public key cryptosystem is one of the most important research subject in modern cryptography.
安全多方计算是现代密码学领域重要的研究内容之一。
Secure multi-party computation is one of the most important areas in modern cryptography.
在现代密码学中，杂凑函数占据基础而又重要的地位。
Cryptographic hash functions play a fundamental role in modern cryptography.
在现代密码学中，可证安全是保证协议安全的一种方式。
In modern cryptography, one way to ensure the security of a protocol is by means of provable security.
DNA在信息科学中的应用，给现代密码学带来了新的挑战和机遇。
The application of DNA in information science brings new challenges and opportunities to modern cryptography.
可验证秘密分享是现代密码学中最重要的工具之一，也是信息安全的基础和基本工具之一。
Verifiable secret sharing is one of the most important tools in modern cryptography, and it is also one of basic tools in keeping secrets.
现代密码学认为，任何加密体系的加密和解密算法都可以公开，其安全性在于密钥的安全性。
In modern cryptography, it is believed that any algorithm of encryption and decryption in cryptographical systems can be open, their safety depends on key security.
现代密码学认为，任何加密体系的加密和解密算法都可以公开，其安全性在于密钥的保密性。
It is believed that in modern cryptography, any algorithm of encryption and decryption in cryptographical systems could be public, and the security should rely on the secure key.
信息隐藏技术是一门建立在数学、现代密码学、信息处理理论和计算机应用技术基础上的交叉性学科。
Information hiding is an interlaced subject, which is built on the basis of mathematics, modern cryptography, information processing theory, and computer applied techniques.
一方面，DNA计算固有的超大规模并行性给安全性依赖于数学困难问题的现代密码学带来了新的挑战。
On one hand, the vast parallelism inherent in DNA computation brings new challenges to modern cryptography, which is based on hard mathematic problems.
建立在现代密码学基础上的信息安全系统，其安全性从根本上依赖于产生重要秘密数据所用随机数的随机性。
Based on modern cryptography, the security of information systems fundamentally depends upon the randomness of random Numbers which are used to produce important secret data.
本文首先介绍网络数据库安全的基础：即现代密码学和数据库安全，接着介绍了指纹特征在身份认证中的原理。
The thesis introduce the base of network database security, which includes modern cryptology and database security, and introduce principle of fingerprint characteristic in identity identification.
第2部分(第4 ~ 7章)主要介绍现代密码学的基本技术，包括对称密码技术(分组密码、序列密码)、Hash函数、公钥密码技术等。
Part 2 (chapters 4-7) introduces the basic techniques of modern cryptography, including symmetric cryptography (block ciphers, stream ciphers), Hash functions, public-key cryptography technology.
密码学在现代信息社会中具有特殊的重要性，混沌的良好特性给密码的设计提供了新的手段。
Cryptography has the crucial importance in modern info-society. The merits of chaos have brought a new means for the design of cryptography.
首先阐述密码学的相关概念，然后对传统密码技术和现代的对称密码算法与非对称密码算法及其安全性进行分析；
Related conception is introduced at first, then the principle and security of conventional cryptology, modern symmetrical encryption algorithms and asymmetrical encryption algorithms are analysed;
首先阐述密码学的相关概念，然后对传统密码技术和现代的对称密码算法与非对称密码算法及其安全性进行分析；
Related conception is introduced at first, then the principle and security of conventional cryptology, modern symmetrical encryption algorithms and asymmetrical encryption algorithms are analysed;
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