Entity authentication method in wireless sensor network

Abstract

The invention provides an entity authentication method in a wireless sensor network, relating to the application field related to sensor network security in information security technology. The invention can ensure the safe communication among nodes by authenticating the identity of nodes in the wireless sensor network. The authentication for determining whether a node is legal and trustable comprises node trust value management, trust group construction, and trust group updating so as to store corresponding trust value in the node. In the information transmission process, the node can determine the information transmission manner and path according to the magnitude of the trust value. The method can acquire effective security authentication strategy by using the ideal of node reputation and the trust group, and can obviate the problem of large calculation amount of digital signature by using public key algorithm, thereby to effectively reduce the authentication delay and improve the network lifetime.

Description

technical field [0001] The invention relates to the field of application related to sensor network security in information security technology, in particular to an entity authentication scheme in the sensor network. Background technique [0002] There is no infrastructure in wireless sensor networks, and all services and configurations are dynamic. Without the support of infrastructure and relatively vulnerable to attacks from wireless links, the security guarantee becomes very fragile. The network faces the following security issues: [0003] (1) Dynamic changes of network topology and members: Due to the mobility of nodes or the random and rapid changes of nodes, the topology of mobile networks may be in a dynamic change. This strengthens the security scheme to solve the dynamic topology problem. [0004] (2) Vulnerable wireless links: Passive and active attacks such as eavesdropping, spoofing, denial of service (DoS), impersonation, forgery, etc. are all potential secur...

AI Technical Summary

Problems solved by technology

[0004] (2) Vulnerable wireless links: Passive and active attacks such as eavesdropping, spoofing, denial of service (DoS), impersonation, forgery, etc. are all potential security risks of wireless links

[0005] (3) Roaming in a dangerous environment: any malicious node may attack or deprive other nodes of services

Although this scheme uses public key encryption, which reduces energy consumption compared to decryption, the application of public key algorithm makes the protocol itself consume a lot of energy for nodes

At the same time, this scheme also has the disadvantages of requiring public key infrastructure and not being able to better defend against denial of service attacks.

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