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SAC'07 Proceedings of the 14th international conference on Selected areas in cryptography
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IMA'05 Proceedings of the 10th international conference on Cryptography and Coding
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Delaying mismatched field multiplications in pairing computations
WAIFI'10 Proceedings of the Third international conference on Arithmetic of finite fields
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Efficient multiplication over extension fields
WAIFI'12 Proceedings of the 4th international conference on Arithmetic of Finite Fields
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Pairings over elliptic curves use fields $\mathbb{F}_{p^k}$ with p *** 2160 and 6 k ≤ 32. In this paper we propose to represent elements in $\mathbb{F}_p$ with AMNS sytem of [1]. For well chosen AMNS we get roots of unity with sparse representation. The multiplication by these roots are thus really efficient in $\mathbb{F}_p$. The DFT/FFT approach for multiplication in extension field $F_{p^k}$ is thus optimized. The resulting complexity of a multiplication in $\mathbb{F}_{p^k}$ combining AMNS and DFT is about 50% less than the previously recommended approach [2].