Brad Antoniewicz is a contributing author to both the Hacking Exposed and Hacking Exposed: Wireless series of books and has authored various internal or external Foundstone tools, whitepapers, and methodologies.
He has spoken at security conferences like Blackhat and Phreaknic
He wrote a whitepaper entitled 'Defeating The iPhone Passcode'.
Author of ProxBrute.
http://packetstormsecurity.com/files/author/6377/
http://phreaknic.info/pn16/speakers
http://www.blackhat.com/eu-13/speakers/Brad-Antoniewicz.html