Faster Point Multiplication on Elliptic Curves with Efficient Endomorphisms
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
ARITH '07 Proceedings of the 18th IEEE Symposium on Computer Arithmetic
Exponentiation in Pairing-Friendly Groups Using Homomorphisms
Pairing '08 Proceedings of the 2nd international conference on Pairing-Based Cryptography
PKC'11 Proceedings of the 14th international conference on Practice and theory in public key cryptography conference on Public key cryptography
Faster explicit formulas for computing pairings over ordinary curves
EUROCRYPT'11 Proceedings of the 30th Annual international conference on Theory and applications of cryptographic techniques: advances in cryptology
Securing electronic medical records using attribute-based encryption on mobile devices
Proceedings of the 1st ACM workshop on Security and privacy in smartphones and mobile devices
Faster squaring in the cyclotomic subgroup of sixth degree extensions
PKC'10 Proceedings of the 13th international conference on Practice and Theory in Public Key Cryptography
Pairing-Friendly elliptic curves of prime order
SAC'05 Proceedings of the 12th international conference on Selected Areas in Cryptography
SAC'11 Proceedings of the 18th international conference on Selected Areas in Cryptography
On the efficient implementation of pairing-based protocols
IMACC'11 Proceedings of the 13th IMA international conference on Cryptography and Coding
Pairing'12 Proceedings of the 5th international conference on Pairing-Based Cryptography
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In 2011, Waters presented a ciphertext-policy attribute- based encryption protocol that uses bilinear pairings to provide control access mechanisms, where the set of user's attributes is specified by means of a linear secret sharing scheme. Some of the applications foreseen for this protocol lie in the context of mobile devices such a smartphones and tablets, which in a majority of instances are powered by an ARM processor supporting the NEON vector set of instructions. In this paper we present the design of a software cryptographic library that implements a 127-bit security level attribute-based encryption scheme over mobile devices equipped with a 1.4GHz Exynos 4 Cortex-A9 processor and a developing board that hosts a 1.7 GHz Exynos 5 Cortex-A15 processor. For the latter platform and taking advantage of the inherent parallelism of the NEON vector instructions, our library computes a single optimal pairing over a Barreto-Naehrig curve approximately 2 times faster than the best timings previously reported on ARM platforms at this level of security. Further, using a 6-attribute access formula our library is able to encrypt/decrypt a text/ciphertext in less than 7.5mS and 15.67mS, respectively.