WebNov 4, 2024 · First, we define a new cryptographic tool called constrained witness pseudorandom function (CWPRF) which is motivated by combining WPRF of Zhandry (TCC 2016) and constrained PRF of Boneh and Waters (ASIACRYPT 2013). More specifically, CWPRF computes pseudorandom values associated with NP statements and generates … Webpreserving the pseudorandomness of the PRF values on the remaining unauthorized inputs. Assuming the existence of one-way functions, constrained PRFs were first constructed …
Chosen Ciphertext Secure Functional Encryption from Constrained Witness PRF
Webconstrained pseudorandom functions (CPRFs), introduced concurrently in [6,34,11]. Recall that a PRF is a family of keyed functions fF kg k2K: X!Ysuch that the input-output behavior of any randomly selected F k should be computationally indistinguishable from that of a truly random function with same domain and range (without any knowledge of k). WebThe paper provides a framework for the verification of business processes, based on an extension of answer set programming (ASP) with temporal logic and constraints. The framework allows to capture expressive fluent annotations as well as data happy birthday images free men
Bi-homomorphic Lattice-Based PRFs and Unidirectional …
WebFeb 24, 2024 · 1. Introduction. Constrained pseudorandom functions (CPRF), concurrently introduced by Boneh and Waters [18], Boyle et al. [20], as well as Kiayias et al. [58], are … WebFeb 29, 2016 · A constrained pseudo random function (PRF) behaves like a standard PRF, but with the added feature that the (master) secret key holder, having secret key K, can … WebA constrained key k can be used to evaluate the PRF on all inputs x for which C(x) = 1. In almost all existing constrained PRF constructions, the constrained key k reveals its constraint C . In this paper we introduce the concept of private constrained PRFs, which are constrained PRFs with the additional property that a constrained key does not ... chairs made in the usa