Node collaboration based Sybil attack detection method

Abstract

The invention discloses a node collaboration based Sybil attack detection method in a power controllable WSN (Wireless Sensor Network) and belongs to the network security technical field. The node collaboration based Sybil attack detection method comprises facing the real network environment which comprises the path loss and shadow fading and is a large scale propagation model to analyze a secondary difference value of an RSSI (Received Signal Strength Indicator) and providing a Sybil node identification algorithm according to the characteristic that the secondary difference value of the RSSI is not affected by changes of the node transmission power, wherein the Sybil node identification algorithm distinguishes whether two nodes are two Sybil identities which are forged through a malicious node or not through the mutual collaboration of public monitoring nodes of the two ordinary nodes. According to the node collaboration based Sybil attack detection method, the characteristics of the secondary difference value of the RSSI and the monitoring node cooperation scheme are combined and accordingly the detection efficiency of Sybil attacks in the power controllable WSN is improved and the network life cycle can be extended.

Description

technical field [0001] The invention belongs to the cross-technical application fields of wireless sensor networks and information security, and in particular relates to a Sybil attack detection method based on node cooperation. Background technique [0002] Sybil attack refers to an attack method in which an attacker makes a legitimate node a malicious node by capturing sensor nodes or listening to a large number of communication messages, and then appears in front of other nodes in the network with multiple false identities. Among them, the node identity forged by malicious nodes is called Sybil node. Early Sybil attacks appeared in P2P networks. Due to the lack of trusted authority centers in distributed networks, a legitimate physical node is easily captured by Sybil attacks, and the reputation system in P2P networks is destroyed by forging peer node identities. , and similar problems also exist in wireless sensor networks. Sybil attack is one of the most important int...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the present invention provides a Sybil attack detection method based on node cooperation, which solves the real environmental conditions that cannot be oriented to the operation of wireless sensor networks in the prior art, and does not consider the node transmission power, resulting in The problem of missed detection and false detection of Sybil nodes

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