Power analysis attacks and countermeasures on η_Tpairing over binary fields

Since many efficient algorithms for implementing pairings have been proposed such as η_Tpairing and the Ate pairing, pairings could be used in constraint devices such as smart cards. However, the secure implementation of pairings has not been thoroughly investigated. In this paper, we investigate the security of η_Tpairing over binary fields in the context of side-channel attacks. We propose efficient and secure η_Tpairing algorithms using randomized projective coordinate systems for computing the pairing.