From cars to cell phones, video equipment to MP3 players, and dishwashers to home thermostats - embedded computers increasingly permeate our lives. But security for these systems is an open question and could prove a more difficult long-term problem than security does today for desktop and enterprise computing. Security issues are nothing new for embedded systems. However, as more embedded systems are connected to the Internet, the potential damages from such vulnerabilities scale up dramatically. Internet connections expose applications to intrusions and malicious attacks. Unfortunately, security techniques developed for enterprise and desktop computing might not satisfy embedded application requirements.