Eric Butler (@codebutler) is a software engineer with an interest in security, privacy, and usability. He’s known for creating Firesheep, an easy to use tool that clearly demonstrated the risks of HTTP session hijacking attacks, and prompted major websites including Facebook, Twitter, and Hotmail to improve their security. He also created FareBot, an Android app that reads data from common NFC transit cards sparking a discussion around the privacy of these systems.