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(Сообщение атоматически закроется через 2 сек.)

CODE

using System;
using System.Security.Cryptography;

namespace Controls
{
    /// <summary>
    /// Summary description for Cryptor.
    /// </summary>
    public class Cryptor
    {
        private  CspParameters cspParam;
        private String publicKey;
        private String privateKey;

        public Cryptor()
        {
             cspParam = new CspParameters();
             cspParam.Flags = CspProviderFlags.UseMachineKeyStore;
            System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider(cspParam);
             publicKey = RSA.ToXmlString(false); //' gets the public key
             privateKey = RSA.ToXmlString(true); //' gets the private key

        
        }
        public String Encrypt(string str)
        {
            System.Security.Cryptography.RSACryptoServiceProvider RSA2 = new System.Security.Cryptography.RSACryptoServiceProvider(cspParam);
            RSA2.FromXmlString(privateKey);
            byte[] EncryptedStrAsByte = RSA2.Encrypt(System.Text.Encoding.Unicode.GetBytes(str), false);
            return System.Text.Encoding.Unicode.GetString(EncryptedStrAsByte);    
        }
        public String Decrypt(string str)
        {
            System.Security.Cryptography.RSACryptoServiceProvider RSA3 = new System.Security.Cryptography.RSACryptoServiceProvider(cspParam);
            RSA3.FromXmlString(publicKey);
            byte[] Byte = RSA3.Decrypt(System.Text.Encoding.Unicode.GetBytes(str), false);
            return System.Text.Encoding.Unicode.GetString(Byte);
        }
    }
}