using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        byte[] tmp;

            string res;

​

            //on décode le paramètre étant en base 64

            byte[] decbuff = Convert.FromBase64String("0vKQf/I4KtpzqelRpPPTPw==");

​

            PasswordDeriveBytes pdb = new PasswordDeriveBytes("BF4D63FF5134538F", Encoding.UTF8.GetBytes("salting"));

​

            TripleDES tdes = TripleDES.Create();

            tdes.Key = pdb.GetBytes(24);

​

            tdes.IV = pdb.GetBytes(8);

​

            ICryptoTransform ict = tdes.CreateDecryptor();

            tmp = ict.TransformFinalBlock(decbuff, 0, decbuff.Length);

​

            //on convertit la chaîne décryptée en string

            res = System.Text.Encoding.UTF8.GetString(tmp, 0, tmp.Length);

            Console.WriteLine(res);

    }

}