Chosen Ciphertext Security for (Hierarchical) Identity-Based Matchmaking Encryption

Sohto Chiku; Keisuke Hara; Junji Shikata

Paper 2024/1292

Chosen Ciphertext Security for (Hierarchical) Identity-Based Matchmaking Encryption

Sohto Chiku

, Yokohama National University

Keisuke Hara

, National Institute of Advanced Industrial Science and Technology, Yokohama National University

Junji Shikata

, Yokohama National University

Abstract

Identity-based matchmaking encryption (IB-ME) is an advanced encryption scheme that enables a sender and a receiver to specify each of identity. In general, from the aspect of abilities for adversaries, we have two flavors of security for encryption schemes chosen plaintext attacks (CPA) security and chosen ciphertext attacks (CCA) security. Compared to CPA security, CCA security can capture active adversaries, then it has been recognized as a desirable one. In this paper, we investigate the CCA security for IB-ME. Concretely, we provide the following three contributions. (i) A method to obtain a CCA secure IB-ME scheme in the standard model based on our new primitive called hierarchical IB-ME (HIB-ME) along with strong one-time signature. (ii) A construction of HIB-ME based on hierarchical identity-based encryption and hierarchical identity-based signature. (iii) A variant of the first method to get an IB-ME scheme satisfying slightly tweaked CCA security solely based on a CPA secure IB-ME scheme (without strong one-time signature). We believe that this new type of CCA security is a reasonable one for IB-ME.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
Keywords: Identity-Based Matchmaking Encryption Chosen Ciphertext Security Generic Construction Pairing Based Cryptography
Contact author(s): chiku-sohto-tw @ ynu jp
hara-keisuke @ aist go jp
shikata-junji-rb @ ynu ac jp
History: 2024-08-20: approved; 2024-08-18: received; See all versions
Short URL: https://ia.cr/2024/1292
License: CC BY

BibTeX

@misc{cryptoeprint:2024/1292,
      author = {Sohto Chiku and Keisuke Hara and Junji Shikata},
      title = {Chosen Ciphertext Security for (Hierarchical) Identity-Based Matchmaking Encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2024/1292},
      year = {2024},
      url = {https://eprint.iacr.org/2024/1292}
}