产生私钥和公钥 System.Security.Cryptography.RSACryptoServiceProvider myrsa = new RSACryptoServiceProvider(); //得到私钥主要保存了RSAParameters中的8各参数 privateKey = myrsa.ToXmlString(true); //得到公钥保存了RSAParameters中2个参数 publicKey = myrsa.ToXmlString(false); RAS实现加密 System.Security.Cryptography.RSACryptoServiceProvider myrsa = new RSACryptoServiceProvider(); //得到公钥 myrsa.FromXmlString(publicKey); //把你要加密的内容转换成byte[] byte[] PlainTextBArray = (new UnicodeEncoding()).GetBytes("这里是你要加密的内容"); //使用.NET中的Encrypt方法加密 byte[] CypherTextBArray = myrsa.Encrypt(PlainTextBArray, false); //最后吧加密后的byte[]转换成Base64String，这里就是加密后的内容了 Result = Convert.ToBase64String(CypherTextBArray) RAS实现解密 System.Security.Cryptography.RSACryptoServiceProvider myrsa = new RSACryptoServiceProvider(); //得到私钥 myrsa.FromXmlString(xmlPrivateKey); //把原来加密后的String转换成byte[] byte[] PlainTextBArray = Convert.FromBase64String("刚才加密后的string"); //使用.NET中的Decrypt方法解密 byte[] DypherTextBArray = myrsa.Decrypt(PlainTextBArray, false); //转换解密后的byte[]，这就得到了我们原来的加密前的内容了 Result = (new UnicodeEncoding()).GetString(DypherTextBArray); byte[] messagebytes = Encoding.UTF8.GetBytes("luo罗");             RSACryptoServiceProvider oRSA = new RSACryptoServiceProvider();             string privatekey = oRSA.ToXmlString(true);             string publickey = oRSA.ToXmlString(false);             //私钥签名              RSACryptoServiceProvider oRSA3 = new RSACryptoServiceProvider();             oRSA3.FromXmlString(privatekey);             byte[] AOutput = oRSA3.SignData(messagebytes, "SHA1");             //公钥验证              RSACryptoServiceProvider oRSA4 = new RSACryptoServiceProvider();             oRSA4.FromXmlString(publickey);             bool bVerify = oRSA4.VerifyData(messagebytes, "SHA1", AOutput);