David is a founder of Subgraph, an open source security startup based in Montreal. Subgraph develops Vega, a free and open source web security testing platform. Previously David was one of the founders of SecurityFocus, where he moderated Bugtraq, a forum for security research with over 50,000 members at its peak. David has spoken at OSCON, FISL, Con Foo, Black Hat, CanSec West, and AusCERT, as well as made contributions to books, magazines, and other publications.
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