Encrypt & Decrypt the Data

Encrypt & Decrypt Data

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;
using System.Diagnostics;

/// <summary>
/// Summary description for EncryptDecrypt
/// </summary>
public class EncryptDecrypt
{
    public EncryptDecrypt()
    {
        //
        // TODO: Add constructor logic here
        //
    }
    public static String Encrypt(string source)
    {
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        byte[] Key = { 12, 13, 14, 15, 16, 17, 18, 19 };
        byte[] IV = { 12, 13, 14, 15, 16, 17, 18, 19 };

        ICryptoTransform encryptor = des.CreateEncryptor(Key, IV);

        try
        {
            byte[] IDToBytes = ASCIIEncoding.ASCII.GetBytes(source);
            byte[] encryptedID = encryptor.TransformFinalBlock(IDToBytes, 0, IDToBytes.Length);
            return Convert.ToBase64String(encryptedID);
        }
        catch (FormatException)
        {
            return null;
        }
        catch (Exception)
        {
            throw;
        }
    }
    public static string Decrypt(string encrypted)
    {
        byte[] Key = { 12, 13, 14, 15, 16, 17, 18, 19 };
        byte[] IV = { 12, 13, 14, 15, 16, 17, 18, 19 };

        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        ICryptoTransform decryptor = des.CreateDecryptor(Key, IV);

        try
        {
            byte[] encryptedIDToBytes = Convert.FromBase64String(encrypted);
            byte[] IDToBytes = decryptor.TransformFinalBlock(encryptedIDToBytes, 0, encryptedIDToBytes.Length);
            return ASCIIEncoding.ASCII.GetString(IDToBytes);
        }
        catch (FormatException)
        {
            return null;
        }
        catch (Exception)
        {
            throw;
        }
    }
}