公钥制RSA算法应用中要注意的几个问题

RSA算法是公钥密码系统的重要算法之一.本文通过研究RSA算法的特点,就其安全性问题提出了构造公钥/私钥对时应注意的几个问题:在公钥选择时要注意的盲区;当公钥/私钥对的选择使密文的幂指数低时会容易受攻击;一个团体使用公共模会造成不安全性;用户私钥丢失后应选用新的模来构造新的公钥/私钥对等等.

Several Attentive Problems in the Application of RSA Public Key Algorithm

RSA algorithm is one of the most important algorithms in public key cryptosystem. According to the characteristic of RSA algorithm, several attentive problems are discussed on security of creating a pair of public-key and private- key in RSA algorithm. More attention should be paid to some blind spots during choosing a public-key. Ciphertext will be easily decrypted in case of its low power. It is unsafe when public modular is used in a group. New modular should be chosen to create new public-key and private-key after old private-key being lost.