So, I'm really irked by headlines like "Microsoft's 'Secret' Security Summit."
First, it wasn't Microsoft's summit. It was an ISOTF meeting that had public web pages. Microsoft provided conference facilities and lunch. I don't think we even bought the beer.
Second, it wasn't a secret. It has web pages: "Internet Security Operations and Intelligence II - a DA Workshop." Things with web pages are rarely secret.
Finally, it was a security summit, but hell, 50% is a rotten ratio for a headline.
So let me delve in to the words "secrecy" and "privacy" just a little. The meeting was private: you had to know the secret handshake to get in. You had to agree not to talk about what was said. That's about privacy. It also includes some secrecy about what, precisely, was said. As I've said before, privacy is a good way to build trust. It allows people to speak openly, because they can rely on anyone who blogs about it not being invited back.
I'm speaking for myself here.