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 problem of incomplete measurement information, difficulty in fully expressing the subjectivity of sensor network node trust, uncertainty, ambiguity, transitivity and dynamics Sexuality, ignoring malicious attacks on trust mechanisms, etc.

CN102333307BInactive Publication Date: 2013-01-09BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-01-09
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

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Embodiment Construction

[0093] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0094] A trust evaluation method for wireless sensor networks based on subjective belief proposed by the present invention, such as figure 1 As shown, it specifically includes the following steps:

[0095] Step 1: According to evidence theory, construct subjective beliefs and realize the formal definition of trust value between nodes. The specific method is:

[0096] Let T and -T respectively represent two mutually exclusive and exhaustive node trust states, that is, "credible" and "untrustworthy" states. According to the D-S evidence theory, the recognition framework Ω={T, -T}, the power set 2 Ω for gather {T}, {T, -T}, {-T} represent "impossible event", "credible event", "uncertain event" and "implausible event", respectively. Basic confidence function m: 2 Ω →[0, 1], m({T}), m({T,-T}) and m({-T}) represent the degree of support of the evidence for ...