Fuzzy Identity-Based Key Agreement Scheme for Wireless Sensor Networks

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In this paper, the authors present a key agreement scheme for Wireless Sensor Networks (WSN) using fuzzy Identity-Based Cryptography (IBC). A sensor can establish shared keys with the other sensors which have same attribute set or similar attribute set at one time. The proposal using fuzzy extractor to construct the public key of a user. Comparing with other schemes, it reduce the number of exponentiations of encryption algorithm, the number of MaptoPoint hash function and the length of ciphertext from O(n) to O(1). Furthermore, they proved the proposed scheme satisfy the security requirement under INDistinguishability of encryptions under Fuzzy Selective-ID, Chosen Plaintext Attack (IND-FSID-CPA).