اینم کد Decrypt کردن MD5 با C# : البته بازم میگم بهترین الگوریتم کدی هستش که خود برنامه نویس اونرو مینویسه:
ublic static string Decrypt(string cipherString, bool useHashing) { byte[] keyArray; //get the byte code of the string byte[] toEncryptArray = Convert.FromBase64String(cipherString); System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader(); //Get your key from config file to open the lock! string key = (string)settingsReader.GetValue("SecurityKey", typeof(String)); if (useHashing) { //if hashing was used get the hash code with regards to your key MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider(); keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key )); //release any resource held by the MD5CryptoServiceProvider hashmd5.Clear(); } else { //if hashing was not implemented get the byte code of the key keyArray = UTF8Encoding.UTF8.GetBytes(key); } TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider(); //set the secret key for the tripleDES algorithm tdes.Key = keyArray; //mode of operation. there are other 4 modes. //We choose ECB(Electronic code Book) tdes.Mode = CipherMode.ECB; //padding mode(if any extra byte added) tdes.Padding = PaddingMode.PKCS7; ICryptoTransform cTransform = tdes.CreateDecryptor(); byte[] resultArray = cTransform.TransformFinalBlock( toEncryptArray, 0, toEncryptArray.Length); //Release resources held by TripleDes Encryptor tdes.Clear(); //return the Clear decrypted TEXT return UTF8Encoding.UTF8.GetString(resultArray); }