Georgia Tech Information Processing, Communications and Security (IPCAS) Research Lab Research Lab

Cryptography and Network/Communications Security Developments in the computer and communication technology have brought a new dimension to the Information Age. Real-time exchange of information regardless of location and distance has greatly increased both the pace of business and the number of ways in which we communicate. The widespread availability and transmission of such information demands new approaches in cryptography. The objective is to build secure and reliable networks out of less secure and less reliable resource constrained devices. Our work spans the range from theoretical cryptography to applications; including significant research efforts in development of new cryptographic primitives, cryptanalysis, and applications from wireless and ad-hoc (sensor) networks to delay-tolerant (DTN) and space-time networks.



Data Authenticity and Availability

Compared to traditional networks, ad-hoc wireless sensor/actuator networks pose new challenges in designing security services. They are more vulnerable to various types of intrusions and malicious attacks due to the constraints of nodes, the lack of infrastructure and multihop data transfer. In these types of networks, an adversary can simply compromise one or more sensor nodes, and then use them as an insider to mount several types of attacks. The major attacks that we will focus in this research are false data injection, data drop, and noise injection. The required security services which prevent the above attacks are data/sender authentication and data availability. We study both unicast and multicast scenarios. We take a random coding approach to jointly solve for packet authentication and availability.