Constant-size threshold attribute based SignCryption for cloud applications

Belguith, S; Kaaniche, N; Laurent, M; Jemai, A; Attia, R

Abstract

In this paper, we propose a novel constant-size threshold attribute-based signcryption scheme for securely
sharing data through public clouds. Our proposal has several advantages. First, it provides flexible cryptographic access control, while preserving users’ privacy as the identifying information for satisfying the access
control policy are not revealed. Second, the proposed scheme guarantees both data origin authentication and
anonymity thanks to the novel use of attribute based signcryption mechanism, while ensuring the unlinkability
between the different access sessions. Third, the proposed signcryption scheme has efficient computation cost
and constant communication overhead whatever the number of involved attributes. Finally, our scheme satisfies strong security properties in the random oracle model, namely Indistinguishability against the Adaptive
Chosen Ciphertext Attacks (IND-CCA2), Existential Unforgeability against Chosen Message Attacks (EUFCMA) and privacy preservation of the attributes involved in the signcryption process, based on the assumption
that the augmented Multi-Sequence of Exponents Decisional Diffie-Hellman (aMSE-DDH) problem and the
Computational Diffie Hellman Assumption (CDH) are hard.

Citation

Belguith, S., Kaaniche, N., Laurent, M., Jemai, A., & Attia, R. (2017, July). Constant-size threshold attribute based SignCryption for cloud applications. Presented at SECRYPT 2017 : 14th International Conference on Security and Cryptography, Madrid, Spain

• Presentation Conference Type: Other
• Conference Name: SECRYPT 2017 : 14th International Conference on Security and Cryptography
• Conference Location: Madrid, Spain
• Start Date: Jul 24, 2017
• End Date: Jul 26, 2017
• Publication Date: Jul 26, 2017
• Deposit Date: May 22, 2019
• Publicly Available Date: May 22, 2019
• DOI: https://doi.org/10.5220/0006469202120225
• Related Public URLs: http://www.secrypt.icete.org/?y=2017
• Additional Information: Event Type : Conference