Physical Security Bypass Techniques: Exploring the Ethics of Full Disclosure

Presented at DEF CON 13 (2005), July 30, 2005, 10 a.m. (50 minutes)

Recent public disclosures detailing physical lock and safe bypass techniques have raised consumer awareness detailing the efficacy of the hardware that protects some of our most important assets. This talk will address the ethics of full-disclosure, the liability for failure to disclose, and the impact of public dissemination. Demonstrations and new discoveries of lock bypass techniques will be reviewed.


  • Marc Weber Tobias - Investigative Law Offices,
    Marc Weber Tobias is an Investigative Attorney and polygraph examiner in the United States. He has written five law enforcement textbooks dealing with criminal law, security, and communications. Marc Tobias was employed for several years by the Office of Attorney General, State of South Dakota, as the Chief of the Organized Crime Unit. As such, he directed felony investigations involving frauds as well as violent crimes. Mr. Tobias is the author of the 1400 page textbook and multimedia collection "Locks, Safes, and Security: An International Police Reference". He consults on lock security and his law firm handles investigations for government and private clients.
  • Matt Fiddler
    Matt Fiddler leads a Threat Management Team for a large Fortune 500 Company. Mr. Fiddler's research into lock bypass techniques have resulted in several public disclosures of critical lock design flaws. Mr. Fiddler began his career as an Intelligence Analyst with the United States Marine Corps. Since joining the commercial sector in 1992, he has spent the last 13 years enhancing his extensive expertise in the area of Unix and Network Engineering, Security Consulting, and Intrusion Analysis.



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