Ask HN: EU conferences to plan for in 2013?

I just got an email reminder that BlackHat EU early bird registration ends in a couple of days. I was wondering is there one simple place to check for upcoming sec conferences this year, mainly in Europe? Any personal favorites you're looking forward to?

They don't have to be big. I'd actually try to avoid big-big. Interesting does it. Bonus points if they don't cost a shitload, because the chances of me coming up with something CFP worthy this year are slim. Like the year before. And the one before that too.