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A signcryption based security for localization using PSO-GD algorithm in WSN is proposed which combines particle swarm optimization (PSO) and gradient decent (GD) methods for secure localization. Initially, the beacon node signcrypt the message with the keys and broadcasted the information to the surrounding nodes so as to enable receiver to identify the sender. Then the received location information is unsigncrypted by each unknown sensor node and verified. If the unsignsryption is performed successfully, the unknown node accepts the message, otherwise discarded. From the location information gathered, the unknown node estimates its location coordinates through PSOGD localization algorithm.

Signcryption Based Security for PSO-GD Localization in WSN