Yih-Chun Hu's Publications
My research interests are generally in the areas of networking, security, and wireless networks. I have worked in a number of areas in these spaces, some of which are described here.
Much of security in wireless networks has been predecated on the idea that outsiders do not know keys or codes. In this research area, we developed protocols for Medium Access and broadcast in environments with insider adversaries.
I developed numerous mechanisms for securing routing, origin and path authentication, and efficient algorithms for hash chains.
Vehicles can avoid accidents through the use of short-range (< 1km) position and velocity reporting. My work includes modeling, simulation, performance evaluation, and security evaluation.
The Internet was designed to allow traffic from any sender to reach any destination. Compromised PCs and IoT devices has led to the ability to flood servers with traffic, knocking them offline. I have developed numerous protocols that allow servers to selectively receive traffic.
Energy Denial-of-Service is a difficult attack in battery-powered devices. I am exploring ways to join wireless charging with data communication to shift the energy burden onto the requestor, eliminating energy DoS. I've also explored using energy limits to mitigate an energy-limited jammer.
Ad hoc networks route traffic over multiple hops from one host to another to expand the range of a wireless signal. I helped develop numerous features in the Dynamic Source Routing (DSR) protocol, as well as security mechanisms for ad hoc network routing. I also developed a secure protocol from the ground up.
Trains pose an interesting security environment: devices are expensive, old, and often cannot be easily retrofit. They also operate in dedicated infrastructure, which can provide distinct wireless properties.
Explored the same-body detection problem, where two devices will share a key if they are on the same body. I'm generally interested in security issues in health care, especially in the US primary care delivery environment.