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Justin Clarke is a Director with Gotham Digital Science, based in the United Kingdom. He has many years of experience in testing the security of networks, web applications, and wireless networks for large financial, retail, and technology clients in the United States, the United Kingdom and New Zealand.

Justin is the co-author of Network Security Tools: Writing, Hacking, and Modifying Security Tools, a contributing author to Network Security Assessment: Know Your Network, 2nd Edition, and the lead author of SQL Injection Attacks and Defenses (Syngress) as well as having been invited to speak at a number of conferences on security topics, including Black Hat, EuSecWest, OSCON and RSA.

Justin is active in developing security tools for penetrating web applications, servers, and wireless networks and as a compulsive tinkerer he can't leave anything alone without at least trying to see how it works.