[Resource Topic] 2024/950: DISCO: Dynamic Searchable Encryption with Constant State

Welcome to the resource topic for 2024/950

Title:
DISCO: Dynamic Searchable Encryption with Constant State

Authors: Xiangfu Song, Yu Zheng, Jianli Bai, Changyu Dong, Zheli Liu, Ee-Chien Chang

Abstract:

Dynamic searchable encryption (DSE) with forward and backward privacy reduces leakages in early-stage schemes. Security enhancement comes with a price – maintaining updatable keyword-wise state information. State information, if stored locally, incurs significant client-side storage overhead for keyword-rich datasets, potentially hindering real-world deployments.

We propose DISCO, a simple and efficient framework for designing DSE schemes using constant client state. DISCO combines range-constrained pseudorandom functions (RCPRFs) over a global counter and leverages nice properties from the underlying primitives and index structure to simultaneously achieve forward-and-backward privacy and constant client state. To configure DISCO concretely, we identify a set of RCPRF properties that are vital for the resulting DISCO instantiations. By configuring DISCO with different RCPRFs, we resolve efficiency and usability issues in existing schemes. We further optimize DISCO’s concrete efficiency without downgrading security. We implement DISCO constructions and report performance, showing trade-offs from different DISCO constructions. Besides, we compare the practical efficiency of DISCO with existing non-constant-state DSE schemes, demonstrating DISCO’s competitive efficiency.

ePrint: https://eprint.iacr.org/2024/950

See all topics related to this paper.

Feel free to post resources that are related to this paper below.

Example resources include: implementations, explanation materials, talks, slides, links to previous discussions on other websites.

For more information, see the rules for Resource Topics .