Gursev Singh Kalra is a Sr. Product Security Engineer at Salesforce.com. Earlier he was working with McAfee as a Senior Principal Consultant and led multiple software security service lines. He loves to write security tools and has authored free tools, like JMSDigger, TesserCap, Oyedata, SSLSmart and clipcaptcha. He has performed security research on CAPTCHAs schemes and implementations, JMS based enterprise messaging applications, OData protocol, mobile application security etc. He has written several security related whitepapers and the security community and experts have voted his research among the top ten web hacks of 2011 and 2012. He has spoken at conferences like Black Hat, OWASP AppSec, NullCon, Focus, ToorCon, and Infosec Southwest etc.