Chris Clark is a principal security consultant at iSEC Partners, where he writes tools, performs penetration tests, and serves as a Windows and Mobile expert. Throughout his software career, Chris has focused exclusively on security, and has assisted several large companies in designing and developing secure software. He has led several teams through implementation of the Security Development Lifecycle (SDL) and the initial bootstrapping process required to develop secure products. By working on server, client, and hosted web applications, Chris has amassed a broad range of security experience. Before joining iSEC, Chris worked for Microsoft where he was responsible for ensuring the security of a both a large-scale payment system and a widely deployed enterprise management product.
Chris has presented on security at RSA 2009, NY/NJ and Seattle OWASP chapter meetings, the SOA Executive Forum, and as a trainer at Blackhat Federal where he collaborated with Immunity and Microsoft to deliver the Defend-the-Flag training. In addition to public speaking, Chris has developed and delivered several trainings to both management teams and engineers working to develop more secure products.


David Thiel is a Principal Security Consultant with iSEC Partners, Inc. He has over 12 years of computer security experience, auditing and designing security infrastructure in the electronic commerce, government, aerospace and online wagering industries. Areas of expertise are web application penetration testing, network protocols, fuzzing, UNIX, and MacOS X. Research interests include mobile and embedded device exploitation, media software vulnerabilities, and attack vectors in emerging web application technologies. He has presented research and security topics at Black Hat USA, Black Hat EU, DEFCON, PacSec and Syscan, and is a contributor to the FreeBSD project.

Himanshu Dwivedi is a founding partner of iSEC Partners, an information security organization. He is a co-author of Hacking Exposed: Web 2.0 and several other books.