physical security - the good, the bad and the ugly - mark seiden Published 12 years ago • 750 plays • Length 1:00:29 Download video MP4 Download video MP3 Similar videos 44:50 physical security [21c3] 0:26 presentation of physical security 1:48:48 physical security - the good, the bad, and the ugly by barry wels & mark seiden at 21c3 5:18 new employee security induction 20:11 physical security: an ever changing mission