Multi-Client Order-Revealing Encryption

Jieun Eom, Dong Hoon Lee, Kwangsu Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Order-revealing encryption is a useful cryptographic primitive that provides range queries on encrypted data since anyone can compare the order of plaintexts by running a public comparison algorithm. Most studies on order-revealing encryption focus only on comparing ciphertexts generated by a single client, and there is no study on comparing ciphertexts generated by multiple clients. In this paper, we propose the concept of multi-client order-revealing encryption that supports comparisons not only on ciphertexts generated by one client but also on ciphertexts generated by multiple clients. We also define a simulationbased security model for multi-client order-revealing encryption. The security model is defined with respect to the leakage function which quantifies how much information is leaked from the scheme. Next, we present two specific multi-client order-revealing encryption schemes with different leakage functions in bilinear maps and prove their security in the random oracle model. Finally, we give the implementation of the proposed schemes and suggest methods to improve the performance of ciphertext comparisons.

Original languageEnglish
JournalIEEE Access
DOIs
Publication statusAccepted/In press - 2018 Aug 11

Keywords

  • Bilinear maps
  • Encryption
  • Medical services
  • Multi-client order-revealing encryption
  • Order-revealing encryption
  • Ores
  • Servers
  • Symmetric-key encryption

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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