Constraining Pseudorandom Functions Privately

PKC, pp. 494-524, 2017.

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Abstract:

In a constrained pseudorandom function PRF, the master secret key can be used to derive constrained keys, where each constrained key﾿k is constrained with respect to some Boolean circuit﾿C. A constrained key﾿k can be used to evaluate the PRF on all inputs﾿x for which $Cx = 1$. In almost all existing constrained PRF constructions...More

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