Just a silly program, take a text and reverse the starting and ending letter of each word (having 2 letters and more), then see if you can still read it. Test it on your friends. Don't overdo it, or you will not have any friends left!

If you can read that result easily, go on and reverse the first two with the last two letters of each word (4 letters and above). Or reverse letters 1 and 2, you get my drift. How far can you go and still read the text? Maybe you can scramble your next e-mail that way, it would make it harder for the government to read it.