John Naughton’s post Does Skype have a back door in Memex 1.1 echoes what I was told by my brother-in-law (ex Norwegian Telewerken and NATO), who insisted, when I first got Skype, that it was not secure: and he has always refused to use it. That was three plus years ago. It would be interesting to hear a little more. Like John Naughton, I use Skype for family, but never for anything sensitive.