基于SHA-1的加密算法

Encryption based on SHA-1 algorithm

SHA-1算法是一种报文摘要算法,无法从该算法生成的报文摘要计算出输入的报文,也无法找到两个不同的可以生成相同报文摘要的报文。基于SHA-1的加密算法是对SHA-1算法进行了扩展。加密算法主要采用分块、并行、置换、查表、移位等技术使文件在SHA-1加密算法的基础上,更加安全。通过解密算法能够破解发送方传来的原文件。基于SHA-1算法的加密算法使文件传输更加安全可靠,实现了文件加密和解密以及数据没有被窃取的功能。

The SHA-1 algorithm is one of message digest algorithm.It is computationally infeasible to input message or come up with two messages having the same message digest.The encryption based on SHA-1 algorithm expands the SHA-1 algorithm. encryption includes blocking,parallel,replacement,lookup,shift technnique,making file securily on SHA-1 encryption.Using decryption explain previous file.Using security of SHA-1 algorithm,the function of file eneryption,decryption and data not tamper is realized.