Queue Video Portrait: Ang Cui

Ang Cui is a Ph.D. student at Columbia University in New York City. His research focuses on embedded devices such as routers, printers and VOIP phones. He is the inventor of a novel, host-based defense mechanism known as Symbiotes. Symbiotes are designed specifically to retrofit black-box, vulnerable, legacy embedded systems with sophisticated anti-exploitation mechanisms. In this video portrait, Ang describes how the extent of the embedded threat in real-world environments, discusses novel exploitation techniques for embedded systems–like enterprise networking equipment–and develops practical defenses for embedded systems that constitute our global communication substrate.


Ang Cui


Queue Portrait: Ang Cui


A Decade of OS Access-control Extensibility

Open source security foundations for mobile and embedded devices


To discuss operating system security is to marvel at the diversity of deployed access-control models: Unix and Windows NT multiuser security; Type Enforcement in SELinux; anti-malware products; app sandboxing in Apple OS X, Apple iOS, and Google Android; and application-facing systems such as Capsicum in FreeBSD. This diversity is the result of a stunning transition from the narrow 1990s Unix and NT status quo to security localization—the adaptation of operating-system security models to site-local or product-specific requirements.

A Decade of OS Access-control Extensibility


Building Systems to Be Shared, Securely

ACM CTO Roundtable on Mobile Devices in the Enterprise

Extensible Programming for the 21st Century