Skype is pretty much based on the Kazaa p2p stack. Which was cracked by quite a few people. It was quite an impressive reasonably secure system, but not rocket science.
Did Kaaza support real time packet transfer? I guess the voice part was added on to Kaaza by the Skype Team. Or the team behind the P2P framework. I forget the name. Its owned by a Estonian Company if I'm right.
But you're right. Its definitely breakable. Kind of challenge that tickles those brain cells.
