ASP.NET

/// <summary>
		/// Encrypt text using 3DES, then encodes it to BASE64
		/// </summary>
		/// <param name="clear">plain text</param>
		/// <returns>Base64 encoded cypher text</returns>
		public static string MakeBase64CypherString(string clear)
		{
			return Convert.ToBase64String(ASCIIEncoding.ASCII.GetBytes(Encrypt(clear)));
		}

		/// <summary>
		/// Decodes a BASE64 string which contains a 3DES cypher text
		/// </summary>
		/// <param name="hidden">Base64 encoded cypher text</param>
		/// <returns>plain text</returns>
		public static string DecodeBase64CypherString(string hidden)
		{
			return Decrypt(ASCIIEncoding.ASCII.GetString(Convert.FromBase64String(hidden)));
		}

		/// <summary>
		/// Encrypt text using 3DES
		/// </summary>
		/// <param name="clear">plain text</param>
		/// <returns>encrypted text</returns>
		protected static string Encrypt(string clear)
		{
			Settings settings = Setting.AllSettings();
			Setting IV = settings["IV"];
			Setting Key = settings["Key"];
			intelli3DESEncryption crypto = new intelli3DESEncryption("StratusRewards.RMA.BusinessServices.Application");
			crypto.IV = IV.Data;
			crypto.Key = Key.Data;
			return crypto.EncryptStringToString(clear);
		}

		/// <summary>
		/// Decrypt text using 3DES
		/// </summary>
		/// <param name="hidden">cypher text</param>
		/// <returns>plain text</returns>
		protected static string Decrypt(string hidden)
		{
			Settings settings = Setting.AllSettings();
			Setting IV = settings["IV"];
			Setting Key = settings["Key"];
			intelli3DESEncryption crypto = new intelli3DESEncryption("StratusRewards.RMA.BusinessServices.Application");
			crypto.IV = IV.Data;
			crypto.Key = Key.Data;
			return crypto.DecryptStringToString(hidden);
		}

		#endregion