Sumit "sid" Siddharth works as a Principal Security Consultant and heads the Penetration Testing department for 7Safe Limited in the UK. He has been a speaker at many security conferences including Defcon, Troopers, OWASP Appsec, Sec-T, IT-Underground etc. He has contributed a number of whitepapers, security tools, exploits and advisories to the industry. He also runs the popular IT security blog www.notsosecure.com.