Cryptology ePrint Archive: Report 2021/1660

Identity-Based Matchmaking Encryption without Random Oracles

Danilo Francati and Alessio Guidi and Luigi Russo and 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.

Category / Keywords: public-key cryptography / Identity-based encryption, matchmaking encryption, plain model

Original Publication (in the same form): INDOCRYPT 2021

Date: received 17 Dec 2021

Contact author: russol at eurecom fr, dfrancati at cs au dk, venturi at di uniroma1 it

Available format(s): PDF | BibTeX Citation

Version: 20211217:143452 (All versions of this report)

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