Bruce Potter, Senior Software Security Analyst at Cigital, Inc., started The Shmoo Group, an ad-hoc group of security and cryptography professionals. He has spoken at the Black Hat and DefCon conferences. Preston Norvell, founder of MacSecurity.org, an organization specializing in Mac OS security, is a Project and Security Engineer for Mercury Data Group. A core member of the Shmoo Group, Brian Wotring is a software engineer for Cisco Systems, developing VPN client software primarily for Mac OS X. Currently, Wotring is lead designer/developer for Osiris, an intrusion detection and file integrity app.