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As to the safety threats faced by sensor networks (SN),nodes limitations of computation,memory and communication,a secure location algorithm (node cooperative secure localization,NCSL) is presented in this paper. The algorithm takes the im-provements of SN location information security as its design tar-gets,utilizing nodes’ cooperation to build virtual antennae array to communicate and localize,and gains arraying antenna advantage for SN without extra hardware cost,such as reducing multi-path effects,increasing receivers’ signal to noise ratio and system capa-bility,reducing transmitting power,and so on. Simulations show that the algorithm based on virtual antennae array has good local-ization ability with a at high accuracy in direction-of-arrival (DOA) estimation,and makes SN capable to resist common malicious attacks,especially wormhole attack,by using the judgment rules for malicious attacks.
As to the safety threats faced by sensor networks (SN), nodes limitations of computation, memory and communication, a secure location algorithm (node cooperative secure localization, NCSL) is presented in this paper. The algorithm takes the im-provements of SN location information security as its design tar-gets, utilizing nodes ’cooperation to build virtual antennae array to communicate and localize, and gains arraying antenna advantage for SN without extra hardware cost, such as reducing multi-path effects, increasing receivers’ signal to noise ratio and system capa-bility, reducing transmitting power, and so on. Simulations show that the algorithm based on virtual antennae array has good local-ization ability with a at high accuracy in direction-of-arrival (DOA) estimation, and makes SN capable to resist common malicious attacks, especially wormhole attack, by using the judgment rules for malicious attacks.