This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
The clients can be all over the world and one server somewhere in Europe. This web service must respond 99% with another string and I figured that GET is the best approach. Of course, I will add SSL on top. Any suggestions on a way to do the encryption and decryption?