Code: /// <summary> /// This method retrieve the string to encrypt from the Presentation Layer /// And return the Encrypted String /// </summary> /// <param name="str"> /// <returns> public string encryptPassword(string strText) { return Encrypt(strText, "&%#@?,:*"); } /// <summary> /// This method retrieve the encrypted string to decrypt from the Presentation Layer /// And return the decrypted string /// </summary> /// <param name="str"> /// <returns> public string decryptPassword(string str) { return Decrypt(str, "&%#@?,:*"); } /// <summary> /// This method has been used to get the Encrypetd string for the /// passed string /// </summary> /// <param name="strText"> /// <param name="strEncrypt"> /// <returns> private string Encrypt(string strText, string strEncrypt) { byte[] byKey = new byte[20]; byte[] dv ={ 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; try { byKey = System.Text.Encoding.UTF8.GetBytes(strEncrypt.Substring(0, 8)); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); byte[] inputArray = System.Text.Encoding.UTF8.GetBytes(strText); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, dv), CryptoStreamMode.Write); cs.Write(inputArray, 0, inputArray.Length); cs.FlushFinalBlock(); return Convert.ToBase64String(ms.ToArray()); } catch (Exception ex) { throw ex; } } /// <summary> /// This method has been used to Decrypt the Encrypted String /// </summary> /// <param name="strText"> /// <param name="strEncrypt"> /// <returns> private string Decrypt(string strText, string strEncrypt) { byte[] bKey = new byte[20]; byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; try { bKey = System.Text.Encoding.UTF8.GetBytes(strEncrypt.Substring(0, 8)); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); Byte[] inputByteArray = inputByteArray = Convert.FromBase64String(strText); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(bKey, IV), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); System.Text.Encoding encoding = System.Text.Encoding.UTF8; return encoding.GetString(ms.ToArray()); } catch (Exception ex) { throw ex; } }