基于双密钥的对称加密算法研究

The Study of Symmetrical Cryptography Based on the Double Key

数据加密是数据安全的一个重要保障。随着计算机技术的发展,数据量越来越大,原有加密算法也越来越不安全。为确保数据安全,加密算法运算量随之增大,而加密速度随之降低。如何在保证加密速度的前提下,获得较高的安全性,这有重要的现实意义。本文研究的是基于双密钥的对称加密算法,试图在保证数据加密速度的同时提高加密的安全性,即通过增加第二密钥来控制加密的过程,使得对称加密算法不再完全"透明",从而在保证数据加密速度的同时提高加密的安全性。

Encryption is one of the most important safeguard to protect the data. As the development of the computer science, the amount of the data is increasing day by day, and the cryptography is not so safe as usual .So the operation of the cryptography is in- creased to protect more data, however the speed of the cryptography is lower. How we will protect the data in a good speed has great meaning. This paper will introduce the double key cryptography. It tries to strengthen the security of the data and meanwhile keeping in a good speed. This paper aims for both the protection of data and better speed, by using the second key to control the process of encryption, in order to make the symmetrical cryptography turning into not completely transparent.