An adaptive secure and practical data sharing system with verifiable outsourced decryption

Author

Shengmin XU
Xingshuo HAN
Guowen XU
Jianting NING
Xinyi HUANG
Robert H. DENG, Singapore Management UniversityFollow

Publication Type

Journal Article

Publication Date

6-2024

Abstract

Cloud computing is the widespread acceptance of a promising paradigm offering a substantial amount of storage and data services on demand. To preserve data confidentiality, many cryptosystems have been introduced. However, current solutions are incompatible with the resource-constrained end-devices because of a variety of vulnerabilities in terms of practicality and security. In this article, we propose a practical and secure data-sharing system by introducing a new design of attribute-based encryption with verifiable outsourced decryption-attribute-based encryption (VO-ABE for short). Our system offers: (1) data sharing at a fine-grained level; (2) a scalable key issuing protocol without any secure channel; (3) a verifiable outsourced decryption mechanism for resource-constrained end-devices against the malicious cloud service provider; and (4) adaptive security against the real-world attacks. To formalize our solution with cryptographic analysis, we present the formal definition of VO-ABE and its concrete construction with provable security. In particular, our design leverages the techniques of the traditional ABE, verifiable outsourced decryption, and randomness extractor to support fine-grained access control, cost-effective data sharing, and security assurance with high entropy. Moreover, our design is provably secure in the adaptive model under the standard assumption, which offers a stronger security guarantee since the state-of-the-art solution is selectively secure under the non-standard assumption and suffers from a variety of real-world attacks. The implementation and evaluation demonstrate that our solution enjoys superior functionality and better performance than the relevant solutions. More importantly, our solution is compatible with the resource-constrained end-devices since the decryption mechanism takes around 1.1 ms and is 22.7x faster than the state-of-the-art solution.

Keywords

Security, Access control, Standards, Encryption, Data models, Adaptive systems, Cloud computing, Adaptive security, fine-grained access control, verifiable outsourced decryption

Discipline

Information Security

Research Areas

Cybersecurity

Publication

IEEE Transactions on Services Computing

Volume

17

Issue

3

First Page

776

Last Page

788

ISSN

1939-1374

Identifier

10.1109/TSC.2023.3321314

Publisher

Institute of Electrical and Electronics Engineers

Citation

XU, Shengmin; HAN, Xingshuo; XU, Guowen; NING, Jianting; HUANG, Xinyi; and DENG, Robert H.. An adaptive secure and practical data sharing system with verifiable outsourced decryption. (2024). IEEE Transactions on Services Computing. 17, (3), 776-788.
Available at: https://ink.library.smu.edu.sg/sis_research/8965

Additional URL

https://doi.org/10.1109/TSC.2023.3321314