Fine-grained Policy Constraints for Distributed Point Function

ePrint Report: Fine-grained Policy Constraints for Distributed Point Function

Keyu Ji, Bingsheng Zhang, Kui Ren

Recently, Servan-Schreiber et al. (S&P 2023) proposed a new notion called private access control lists (PACL) for function secret sharing (FSS), where the FSS evaluators can ensure that the FSS dealer is authorized to share the given function with privacy assurance. In particular, for the secret sharing of a point function $f_{\alpha, \beta}$, namely distributed point function (DPF), the authors showed how to efficiently restrict …

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