Visible to the public Morphing communications of Cyber-Physical Systems towards moving-target defense

TitleMorphing communications of Cyber-Physical Systems towards moving-target defense
Publication TypeConference Paper
Year of Publication2014
AuthorsYu Li, Rui Dai, Junjie Zhang
Conference NameCommunications (ICC), 2014 IEEE International Conference on
Date PublishedJune
KeywordsAlgorithm design and analysis, computer network reliability, CPS traffic, CPSMorph traffic morphing algorithm, Cyber-physical systems, delays, eavesdrop network traffic, Information systems, inter-packet delays, Internet, long-range communication services, morphing communications, Moving-Target Defense, network sessions, networking infrastructures, Real-time Systems, reliable communication services, security, Silicon, telecommunication traffic, thwarting traffic analysis attacks, Time factors, traffic analysis attacks

Since the massive deployment of Cyber-Physical Systems (CPSs) calls for long-range and reliable communication services with manageable cost, it has been believed to be an inevitable trend to relay a significant portion of CPS traffic through existing networking infrastructures such as the Internet. Adversaries who have access to networking infrastructures can therefore eavesdrop network traffic and then perform traffic analysis attacks in order to identify CPS sessions and subsequently launch various attacks. As we can hardly prevent all adversaries from accessing network infrastructures, thwarting traffic analysis attacks becomes indispensable. Traffic morphing serves as an effective means towards this direction. In this paper, a novel traffic morphing algorithm, CPSMorph, is proposed to protect CPS sessions. CPSMorph maintains a number of network sessions whose distributions of inter-packet delays are statistically indistinguishable from those of typical network sessions. A CPS message will be sent through one of these sessions with assured satisfaction of its time constraint. CPSMorph strives to minimize the overhead by dynamically adjusting the morphing process. It is characterized by low complexity as well as high adaptivity to changing dynamics of CPS sessions. Experimental results have shown that CPSMorph can effectively performing traffic morphing for real-time CPS messages with moderate overhead.

Citation Key6883383