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We consider the problem of a client efficiently, privately and securely delegating the computation of multiple group exponentiations to a computationally more powerful server (e.g. a cloud server). We provide the first practical and provable solutions to this batch delegation problem for groups commonly used in cryptography, based on discrete logarithm and RSA hardness assumptions. Previous results...
One of the the most propitious enablers of the Smart Grid paradigm, and a rather low-hanging fruit, is Demand Response (DR) programs. DR is a set of courses of actions to reach and maintain the supply-demand equilibrium of the power grid from the side of the demand through price or incentive-based routines. The latter includes many programs with some bidding component. The general consensus among...
We first propose an efficient anonymous multi- receiver encryption scheme to achieve the security properties of confidentiality and anonymity, which protects the receiver identity privacy and keeps the message confidential. The anonymity of proposed scheme is secure against outer attackers and inner attackers simultaneously. Based on the first construction, we also present a dual-anonymous multireceiver...
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