Wireless sensor network (WSN) trust evaluation method based on subjective belief

A wireless sensor and belief technology, applied in wireless communication, network topology, electrical components, etc., can solve the problems of ignoring the context correlation of trust content, unreliable data packets, and ignoring the recommended trust value of neighbor nodes, etc.

Inactive Publication Date: 2012-01-25
BEIHANG UNIV
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Problems solved by technology

② Incomplete measurement information, changes in the measurement environment, and node failures will all cause inaccurate measurement results
On the other hand, the collision, instability, unreliability and other characteristics of the node transmission channel are likely to cause the loss of data packets and the increase of uncertain measurement results.
③Although all nodes work together to obtain more accurate monitoring results, in the case of limited resources, selfish nodes or inaction nodes may reduce the degree of network participation to extend their own network life c

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  • Wireless sensor network (WSN) trust evaluation method based on subjective belief
  • Wireless sensor network (WSN) trust evaluation method based on subjective belief
  • Wireless sensor network (WSN) trust evaluation method based on subjective belief

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[0094] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0095] The present invention proposes a wireless sensor network trust evaluation method based on subjective beliefs, such as figure 1 As shown, it specifically includes the following steps:

[0096] Step 1: According to the evidence theory, construct subjective beliefs and realize the formal definition of trust value between nodes. The specific method is:

[0097] Let T and -T represent two mutually exclusive and exhaustive node trust states, namely "trusted" and "untrusted" states. According to DS evidence theory, the recognition framework Ω = {T, -T}, power set 2 Ω for set {T}, {T, -T}, {-T} represent "impossible event", "trusted event", "uncertain event", and "untrusted event" respectively. Basic confidence function m: 2 Ω →[0,1], m({T}), m({T,-T}) and m({-T}) respectively represent the degree of support of the evidence to the trustworthiness, uncertainty and...

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Abstract

The invention provides a wireless sensor network (WSN) trust evaluation method based on subjective belief, and belongs to the technical field of WSN security. The trust evaluation method comprises the following steps of: 1. implementing formal definition of trust values among nodes; 2. establishing and updating a trust evaluation sheet for an evaluation object by an evaluation subject; 3. calculating an observed value of the direct trust value during the current time period; 4. calculating the direct trust value during the current time period; 5. establishing a trust recommendation structure between the evaluation subject and the evaluation object; 6. calculating the recommendation trust value of the evaluation object by the evaluation subject; and 7. obtaining the overall trust value of the evaluation object and judging whether the evaluation object is trusted. The WSN trust evaluation method has the advantages that a universal WSN distributed trust evaluation method is established; the trust relationship among the nodes is defined; formal definition, calculation, update and transmission for node trust are realized based on the subjective belief; and subjectivity, fuzziness, uncertainty, dynamic nature and transitivity of the trust values are better reflected.

Description

(1) Technical field [0001] The invention belongs to the technical field of wireless sensor network security, in particular to the technical field of distributed trust management mechanism, and specifically relates to a wireless sensor network trust evaluation method based on subjective belief. (2) Background technology [0002] Wireless sensor network (referred to as sensor network) is composed of a large number of micro-sensor nodes with data acquisition and processing functions deployed in the monitoring area, and forms a multi-hop self-organizing network through wireless communication to realize cooperative perception, Collect and process the information of monitoring objects in the network coverage area. Wireless sensor networks can be widely used in military security, pipe network detection, environmental monitoring and prediction, industrial control, space exploration, medical care, smart home, smart transportation and smart cities, and will play an increasingly import...

Claims

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Application Information

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IPC IPC(8): H04W12/00H04W24/00H04W84/18H04W12/121
Inventor 吴银锋周翔冯仁剑于宁万江文
Owner BEIHANG UNIV
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