DES_RSA及其混合算法的加密速度研究

为了在保证安全性的前提下提高大量数据加密的加密速度,本文通过DES和RSA算法的分析,针对DES算法密钥安全性差和RSA算法加密速度慢的问题,提出DES和RSA混合算法.对比DES和RSA两种算法加密所需时间,就RSA算法耗时长的问题,通过几种可行的大素数判定算法分析,提出改进的大素数判定算法.在保证安全性的前提下,将改进的大素数判定算法应用于RSA算法中,提升了加密速度.由于改进算法加密速度仍远差于DES算法,不适合大量数据加密.因此在兼顾安全性与加密速度的基础上,提出DES和RSA混合加密算法.经分析该算法综合了前两种算法的优点,是一种理想的加密算法.

Research on the encryption speed of DES_RSA and their hybrid algorithm

In order to raise the encryption speed of large amounts of data which is guaranteed under the premise of safety, through the analysis of DES and RSA algorithms, know that the encryption key security of DES algorithm is poor and the speed of RSA encryption algorithm is slow, to solve these problems, DES and RSA hybrid algorithm is put forward. Compare the encryption time of DES and RSA algorithms, as the RSA encryption takes long time, by analysing several feasible big prime testing algorithnls, to put forward the improved big prime number generation algorithm. Use the improved big prime number generation algorithm in the RSA algorithm, encryption speed has improved. As the encryption speed of the improved algorithm is still far worse than DES algorithm, still not suitable for large amounts of data encryption. So on the basis of both security and encryption speed, put forward DES and RSA hybrid encryption algorithm. This algorithm combines the advantages of the first two algorithms, is a good kind of ideal.