Contributing Authors

Roelof Temmingh Born in South Africa, Roelof studied at the University of Pretoria and completed his Electronic Engineering degree in 1995. His passion for computer security had by then caught up with him and manifested itself in various forms. He worked as developer, and later as a system architect at an information security engineering firm from 1995 to 2000. In early 2000 he founded the security assessment and consulting firm SensePost along with some of the leading thinkers in the field. During his time at SensePost he was the Technical Director in charge of the assessment team and later headed the Innovation Centre for the company. Roelof has spoken at various international conferences such as Blackhat, Defcon, Cansecwest, RSA, Ruxcon, and FIRST. He has contributed to books such as Stealing the Network: How to Own a Continent, Penetration Tester’s Open Source Toolkit, and was one of the lead trainers in the “Hacking by Numbers" training course. Roelof has authored several well known security testing applications like Wikto, Crowbar, BiDiBLAH and Suru. At the start of 2007 he founded Paterva in order to pursue R&D in his own capacity. At Paterva Roelof developed an application called Evolution (now called Maltego) that has shown tremendous promise in the field of information collection and correlation.

Petko “pdp” D. Petkov is a senior IT security consultant based in London, United Kingdom. His day-to-day work involves identifying vulnerabilities, building attack strategies and creating attack tools and penetration testing infrastructures. Petko is known in the underground circles as pdp or architect but his name is well known in the IT security industry for his strong technical background and creative thinking. He has been working for some of the world’s top companies, providing consultancy on the latest security vulnerabilities and attack technologies.

His latest project, GNUCITIZEN (gnucitizen.org), is one of the leading web application security resources on-line where part of his work is disclosed for the benefit of the public. Petko defines himself as a cool hunter in the security circles.

He lives with his lovely girlfriend Ivana, without whom his contribution to this book would not have been possible.

CP is a moderator of the GHDB and forums at http://johnny.ihackstufT.com, a Developer of many open source tools including Advanced Dork: and Google Site Indexer, Co-Founder of http://tankedgenius.com, a freelance security consultant, and an active member of DC949 http://dc949.org in which he takes part in developing and running an annual hacking contest Known as Amateur/Open Capture the Flag as well as various research projects.

“I am many things, but most importantly, a hacker.” – CP

Jeff Stewart, Jeffball55, currently attends East Stroudsburg University where he’s majoring in Computer Science, Computer Security, and Applied Mathematics. He actively participates onjohnny.ihackstufF.com forums, where he often writes programs and Firefox extensions that interact with Google’s services. All of his current projects can be found on http://www.tankedgenius.com. More recently he has taken a job with FD Software Enterprise, to help produce an Incident Management System for several hospitals.

Ryan Langley is a California native who is currently residing in Los Angeles. A part time programmer and security evaluator Ryan is constantly exploring and learning about IT security, and new evaluation techniques. Ryan has five years of system repair and administration experience. He can often be found working on a project with either CP or Jeffball.