RSA的最重要特色在于双密钥，它们有特殊的数学形式。RSA的一对密钥有三个基本参数：模n ，公钥b和私钥a 。n和b是公开的，发送信息方用私钥n加密消息，接受方用公钥b能得到解密后的信息，从而确定发送信息方的身份，这就构成了签名机制。对方用公钥将要发送的信息加密，只有拥有私钥的一方才能将信息解密。-RSA is the most important feature of dual-key, they have a special mathematical form. RSA keys of a pair of three basic parameters: modulus n, public key private key b and a. n and b are open to the public to send a message encrypted using the private key n message recipient using the public key can be decrypted b after information, send a message to determine the identity of parties, which constitute a signature. The other side will use public key encryption to send information that only those with the private key of the party can decrypt the information.