Wormhole attacks in wireless networks

摘要: As mobile ad hoc network applications are deployed, security emerges as a central requirement. In this paper, we introduce the wormhole attack, severe attack in networks that is particularly challenging to defend against. The possible even if attacker has not compromised any hosts, and all communication provides authenticity confidentiality. an records packets (or bits) at one location network, tunnels them (possibly selectively) another location, retransmits there into network. can form serious threat wireless networks, especially against many routing protocols location-based systems. For example, most existing protocols, without some mechanism would be unable find routes longer than or two hops, severely disrupting communication. We present general mechanism, called packet leashes, for detecting and, thus defending attacks, specific protocol, TIK, implements leashes. also discuss topology-based detection, show it impossible these approaches detect topologies.