2009 | OriginalPaper | Buchkapitel
Computational Differential Privacy
verfasst von : Ilya Mironov, Omkant Pandey, Omer Reingold, Salil Vadhan
Erschienen in: Advances in Cryptology - CRYPTO 2009
Verlag: Springer Berlin Heidelberg
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The definition of differential privacy has recently emerged as a leading standard of privacy guarantees for algorithms on statistical databases. We offer several relaxations of the definition which require privacy guarantees to hold only against
efficient
—i.e., computationally-bounded—adversaries. We establish various relationships among these notions, and in doing so, we observe their close connection with the theory of pseudodense sets by Reingold et al.[1]. We extend the dense model theorem of Reingold et al. to demonstrate equivalence between two definitions (indistinguishability- and simulatability-based) of computational differential privacy.
Our computational analogues of differential privacy seem to allow for more accurate constructions than the standard information-theoretic analogues. In particular, in the context of private approximation of the distance between two vectors, we present a differentially-private protocol for computing the approximation, and contrast it with a substantially more accurate protocol that is only
computationally
differentially private.