如何在C＃中使用公钥和私钥加密技术

我想使用公钥/私钥技术加密数据。 我的意思是，用接收器的公钥加密，接收器可以用自己的私钥解密。

我怎样才能做到这一点？ 您有任何建议或示例代码吗？

Answer 1

代码示例：

private static string _privateKey; private static string _publicKey; private static UnicodeEncoding _encoder = new UnicodeEncoding(); private static void RSA() { var rsa = new RSACryptoServiceProvider(); _privateKey = rsa.ToXmlString(true); _publicKey = rsa.ToXmlString(false); var text = "Test1"; Console.WriteLine("RSA // Text to encrypt: " + text); var enc = Encrypt(text); Console.WriteLine("RSA // Encrypted Text: " + enc); var dec = Decrypt(enc); Console.WriteLine("RSA // Decrypted Text: " + dec); } public static string Decrypt(string data) { var rsa = new RSACryptoServiceProvider(); var dataArray = data.Split(new char[] { ',' }); byte[] dataByte = new byte[dataArray.Length]; for (int i = 0; i < dataArray.Length; i++) { dataByte[i] = Convert.ToByte(dataArray[i]); } rsa.FromXmlString(_privateKey); var decryptedByte = rsa.Decrypt(dataByte, false); return _encoder.GetString(decryptedByte); } public static string Encrypt(string data) { var rsa = new RSACryptoServiceProvider(); rsa.FromXmlString(_publicKey); var dataToEncrypt = _encoder.GetBytes(data); var encryptedByteArray = rsa.Encrypt(dataToEncrypt, false).ToArray(); var length = encryptedByteArray.Count(); var item = 0; var sb = new StringBuilder(); foreach (var x in encryptedByteArray) { item++; sb.Append(x); if (item < length) sb.Append(","); } return sb.ToString(); }