I just double checked the ISC2 website and according to the official CISSP Recertification Guidelines, Security Conferences count toward credits at 1CPE/hr
ConferencesSince Mooner and I recorded the speakers we saw, there is the auditable proof of our attendance. Of course everyone can get CPE credits for watching the presentations once they are up online.
CISSPs earn 1 CPE credit for each hour of attendance at a conference. Security conferences qualify as Group “A” CPEs. Other educational conferences qualify as Group “B” CPEs.