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arXiv · 2103.15942

DP-Sync: Hiding Update Patterns in Secure Outsourced Databases with Differential Privacy

Chenghong Wang·Johes Bater·Kartik Nayak·Ashwin Machanavajjhala
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Abstract

In this paper, we have introduced a new type of leakage associated with modern encrypted databases called update pattern leakage. We formalize the definition and security model of DP-Sync with DP update patterns. We also proposed the framework DP-Sync, which extends existing encrypted database schemes to DP-Sync with DP update patterns. DP-Sync guarantees that the entire data update history over the outsourced data structure is protected by differential privacy. This is achieved by imposing differentially-private strategies that dictate the data owner's synchronization of local~data.

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Chenghong Wang, Johes Bater, Kartik Nayak, Ashwin Machanavajjhala. 2021-03-29. DP-Sync: Hiding Update Patterns in Secure Outsourced Databases with Differential Privacy. https://doi.org/10.1145/3448016.3457306

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