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copied!<p><a href="http://www.achadwick.com/DeveloperBlog/Result/Triple%20DES%20Encryption" rel="nofollow">Here</a> is a complete example copy paste ready..</p> <pre><code>using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Security.Cryptography; using System.Text; using System.Web; namespace MVC3JavaScript_3_2012.Utilities { public class MyTripleDES { private readonly TripleDESCryptoServiceProvider _des = new TripleDESCryptoServiceProvider(); private readonly UTF8Encoding _utf8 = new UTF8Encoding(); /// <summary> /// Key to use during encryption and decryption /// </summary> private byte[] _keyValue; public byte[] Key { get { return _keyValue; } private set { _keyValue = value; } } /// <summary> /// Initialization vector to use during encryption and decryption /// </summary> private byte[] _ivValue; public byte[] IV { get { return _ivValue; } private set { _ivValue = value; } } /// <summary> /// Constructor, allows the key and initialization vector to be provided as strings /// </summary> /// <param name="key"></param> /// <param name="iv"></param> public MyTripleDES(string key, string iv) { _keyValue = Convert.FromBase64String(key); _ivValue = Convert.FromBase64String(iv); } /// <summary> /// Decrypt Bytes /// </summary> /// <param name="bytes"></param> /// <returns></returns> public byte[] Decrypt(byte[] bytes) { return Transform(bytes, _des.CreateDecryptor(_keyValue, _ivValue)); } /// <summary> /// Encrypt Bytes /// </summary> /// <param name="bytes"></param> /// <returns></returns> public byte[] Encrypt(byte[] bytes) { return Transform(bytes, _des.CreateEncryptor(_keyValue, _ivValue)); } /// <summary> /// Decrypt a string /// </summary> /// <param name="text"></param> /// <returns></returns> public string Decrypt(string text) { byte[] input = HttpServerUtility.UrlTokenDecode(text); byte[] output = Transform(input, _des.CreateDecryptor(_keyValue, _ivValue)); return _utf8.GetString(output); } /// <summary> /// Encrypt a string and return Base64String /// </summary> /// <param name="text"></param> /// <returns></returns> public string Encrypt(string text) { byte[] input = _utf8.GetBytes(text); byte[] output = Transform(input, _des.CreateEncryptor(_keyValue, _ivValue)); return HttpServerUtility.UrlTokenEncode(output); } /// <summary> /// Encrypt or Decrypt bytes. /// </summary> private byte[] Transform(byte[] input, ICryptoTransform cryptoTransform) { // Create the necessary streams using (var memory = new MemoryStream()) { using (var stream = new CryptoStream(memory, cryptoTransform, CryptoStreamMode.Write)) { // Transform the bytes as requested stream.Write(input, 0, input.Length); stream.FlushFinalBlock(); // Read the memory stream and convert it back into byte array memory.Position = 0; var result = new byte[memory.Length]; memory.Read(result, 0, result.Length); // Return result return result; } } } public static string CreateNewVector() { using (var des = new System.Security.Cryptography.TripleDESCryptoServiceProvider()) { des.GenerateIV(); return Convert.ToBase64String(des.IV); } } public static string CreateNewKey() { using (var des = new System.Security.Cryptography.TripleDESCryptoServiceProvider()) { des.GenerateKey(); return Convert.ToBase64String(des.Key); } } } } </code></pre>

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