Method of generating encryption key used in communication in wireless sensor network, and Method for data communication using above mentioned Method, and System for these purpose

摘要

A method for generating an encryption key for communication in a wireless sensor network, a data communication method using the same, and a system using the same are provided to maximize the energy efficiency of a sensor node and to improve security by applying different encryption keys to data density of data communication. A normal node(600) encrypts data sensed by using an encryption key generated by a symmetrical ciphering algorithm and transfers the encrypted data to a representative node(202). The representative node decrypts the encrypted data. The representative node encrypts the decrypted data by using an encryption key generated by using an asymmetrical ciphering algorithm, and transfers the encrypted data to a manager node(120). The manager node decrypts the encrypted data and transfers the decrypted data to a sensing information management server(130). The sensing information management server determines whether an abnormal effect is generated from a particular region on the basis of the received data. The sensing information management server transfers the results to a user terminal(142).