I went to the Chaos Communication Congress (30C3)[1]. There were a number of interesting talks, videos of which can be found online[2]. Of particular interest, though one event I didn't go to, is the cryptoparty workshop[3]. Towards the bottom of the page is a link to a pad containing notes from the session.
[1]: https://events.ccc.de/congress/2013/wiki/Main_Page [2]: https://media.ccc.de/browse/congress/2013/ [3]: https://events.ccc.de/congress/2013/wiki/Session:HowTo_Host_a_Cryptoparty
Simon