Identity-Based Matchmaking Encryption without Random Oracles

Danilo Francati; Alessio Guidi; Luigi Russo; Daniele Venturi

Paper 2021/1660 Original: eprint.iacr.org/2021/1660 ↗

Identity-Based Matchmaking Encryption without Random Oracles

Danilo Francati

Alessio Guidi

Luigi Russo

Daniele Venturi

Abstract

Identity-based matchmaking encryption (IB-ME) is a generalization of identity-based encryption where the sender and the receiver can both specify a target identity: if both the chosen target identities match the one of the other party, the plaintext is revealed, and otherwise the sender’s identity, the target identity, and the plaintext remain hidden. Previous work showed how to construct IB-ME in the random oracle model. We give the first construction in the plain model, based on standard assumptions over bilinear groups.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
History: 2021-12-17: last updated; 2021-12-17: published
Short URL: https://ia.cr/2021/1660
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2021/1660,
      author = {Danilo Francati and Alessio Guidi and Luigi Russo and Daniele Venturi},
      title = {Identity-Based Matchmaking Encryption without Random Oracles},
      howpublished = {Cryptology {ePrint} Archive, Paper 2021/1660},
      year = {2021},
      url = {https://eprint.iacr.org/2021/1660}
}