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On the differential privacy of dynamic location obfuscation with personalized error bounds. (arXiv:2101.12602v3 [cs.CR] UPDATED)
cs.CR updates on arXiv.org arxiv.org
Geo-indistinguishability and expected inference error are two complementary
notions for location privacy. The joint guarantee of differential privacy
(indistinguishability) and distortion privacy (inference error) limits the
information leakage. In this paper, we analyze the differential privacy of
PIVE, a dynamic location obfuscation mechanism proposed by Yu, Liu and Pu (NDSS
2017), and show that PIVE fails to offer either of the privacy guarantees on
adaptive Protection Location Sets (PLSs) as claimed. Specifically, we
demonstrate that different PLSs could intersect with …
differential privacy dynamic error location obfuscation privacy