My research focuses on the security of computing devices, systems, and networks. Recent work in my group has included securing embedded systems and protocols, mobile device security and privacy, establishing the trustworthiness of data and maintaing its provenance, protection of Internet traffic and the SSL infrastructure, and attacks and defenses against the cloud infrastructure. Some of my other research areas of interest include securing Internet routing, malware propagation, applied cryptosystems, adversarial machine learning, cyber-physical systems, and trustworthy computing.