Achieving short ciphertexts or short secret-keys for adaptively secure general inner-product encryption

Tatsuaki Okamoto, Katsuyuki Takashima

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

In this paper, we present two non-zero inner-product encryption (NIPE) schemes that are adaptively secure under a standard assumption, the decisional linear (DLIN) assumption, in the standard model. One of the proposed NIPE schemes features constant-size ciphertexts and the other features constant-size secret-keys. Our NIPE schemes imply an identity-based revocation (IBR) system with constant-size ciphertexts or constant-size secret-keys that is adaptively secure under the DLIN assumption. Any previous IBR scheme with constant-size ciphertexts or constant-size secret-keys was not adaptively secure in the standard model. This paper also presents two zero inner-product encryption (ZIPE) schemes each of which has constant-size ciphertexts or constant-size secret-keys and is adaptively secure under the DLIN assumption in the standard model. They imply an identity-based broadcast encryption system with constant-size ciphertexts or constant-size secret-keys that is adaptively secure under the DLIN assumption. We also extend the proposed ZIPE schemes in two directions, one is a fully-attribute-hiding ZIPE scheme with constant-size secret-keys, and the other a hierarchical ZIPE scheme with constant-size ciphertexts.

Original languageEnglish
Pages (from-to)725-771
Number of pages47
JournalDesigns, Codes, and Cryptography
Volume77
Issue number2-3
DOIs
Publication statusPublished - 2015 Dec 3
Externally publishedYes

Keywords

  • Functional encryption
  • Inner-product encryption
  • Non-zero inner-product encryption

ASJC Scopus subject areas

  • Computer Science Applications
  • Applied Mathematics

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