Hi Alvin,

I don't see anything in your question that pertains to the 8052...

There are a lot of tutorial sites on the web for learning C and C++. C++ is not generally deemed suitable for the 8052 by the way.

There are also a lot of sites with information about encryption. If you look at an open source site such as http://www.freshmeat.net and search for "encrypt" you will probably find something that might at least give you some ideas.

Dennis