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• An algebraic framework for Diffie–Hellman assumptions ﻿

(2015-10-22)
Article
Accés obert
We put forward a new algebraic framework to generalize and analyze Diffie-Hellman like Decisional Assumptions which allows us to argue about security and applications by considering only algebraic properties. Our D,k-MDDH ...
• Constant size ciphertexts in threshold attribute-based encryption ﻿

(Springer Verlag, 2010)
Text en actes de congrés
Accés obert
Attribute-based cryptography has emerged in the last years as a promising primitive for digital security. For instance, it provides good solutions to the problem of anonymous access control. In a ciphertextpolicy attribute-based ...
• Matrix computational assumptions in multilinear groups ﻿

(2015-04-20)
Report de recerca
Accés obert
We put forward a new family of computational assumptions, the Kernel Matrix Di e- Hellman Assumption. Given some matrix A sampled from some distribution D ;k , the kernel as- sumption says that it is hard to nd \in the exponent