Strengthening Order Preserving Encryption with Differential Privacy. (arXiv:2009.05679v4 [cs.CR] UPDATED)

Ciphertexts of an order-preserving encryption (OPE) scheme preserve the order
of their corresponding plaintexts. However, OPEs are vulnerable to inference
attacks that exploit this preserved order. At another end, differential privacy
has become the de-facto standard for achieving data privacy. One of the most
attractive properties of DP is that any post-processing (inferential)
computation performed on the noisy output of a DP algorithm does not degrade
its privacy guarantee. In this paper, we propose a novel differentially private
order preserving …

differential privacy encryption order privacy