RSA+DES混合文件加密



RSA算法是第一个能同时用于加密和数字签名的算法，也易于理解和操作。

　　RSA是被研究得最广泛的公钥算法，从提出到现在已近二十年，经历了各种攻击的考验，逐渐为人们接受，普遍认为是目前最优秀的公钥方案之一。RSA的安全性依赖于大数的因子分解，但并没有从理论上证明破译RSA的难度与大数分解难度等价。即RSA的重大缺陷是无法从理论上把握它的保密性能如何，而且密码学界多数人士倾向于因子分解不是NPC问题。

-Hybrid RSA+ DES File encryption RSA algorithm is the first can be used for both encryption and digital signature algorithms, but also easy to understand and operate. RSA is the most widely studied public key algorithm, which made nearly two decades now, through the various attacks the test, was gradually accepted, generally considered the best public key is one of the options. RSA' s security relies on the factorization of large numbers, but not theoretically prove the difficulty of deciphering the RSA and the difficulty of large integer equivalent. RSA' s major flaw is that in theory can not grasp how the performance of its security and passwords, many academics are not the NPC tends to factorization problems.