XTEA
Introduction
XTEA is a secure encryption algorithm, though not as secure as RSA or others, that uses a 128bit key and requires very little processing power.
Make sure you only attempt to encrypt arrays with a size divisible by eight.
Getting Started
The following example shows the basic encryption and decryption of a string. When you use the parameterless constructor of the Xtea object, a key is generated for you that you can find in the Key property. If you pass a key to the constructor, it will be used instead.
using GHI.Utilities;
using Microsoft.SPOT;
using System.Text;
public class Program
{
public static void Main()
{
var xtea = new Xtea();
var encrypted = xtea.Encrypt(Encoding.UTF8.GetBytes("0123456776543210"));
var decrypted = xtea.Decrypt(encrypted);
Debug.Print(new string(Encoding.UTF8.GetChars(decrypted))); //should be "0123456776543210"
var keyStr = "0x";
for (int i = 0; i < Xtea.KeyLength; i++)
keyStr += xtea.Key[i].ToString("x2");
Debug.Print("The key used was " + keyStr);
}
}