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Using ProtectedData to protect string value

using System; using System.Security; using System.Security.Cryptography; using System.Collections.Generic; using System.Text;     class Program     {         static void Main(string[] args)         {             string fileMessage = "this is another test";             byte[] fileMsgArray = System.Text.ASCIIEncoding.ASCII.GetBytes(fileMessage);             byte[] entropy = { 0, 1, 3, 5, 7, 9 };             byte[] protectedMessage = ProtectedData.Protect(fileMsgArray, entropy, DataProtectionScope.CurrentUser);             Console.WriteLine("Protected byte array:");             Console.WriteLine(System.Text.ASCIIEncoding.ASCII.GetString(protectedMessage));             byte[] clearMessage = ProtectedData.Unprotect(protectedMessage, entropy, DataProtectionScope.CurrentUser);             Console.WriteLine("Unprotected/Decrypted Data:");             Console.WriteLine(ASCIIEncoding.ASCII.GetString(clearMessage));         }     }