Article: Authority revocation scheme for MA-CP-ABE-based secure communication in IoMT ecosystem Journal: International Journal of Applied Cryptography (IJACT) 2022 Vol.4 No.2 pp.104 - 120 Abstract: The proliferation of the internet of medical things (IoMT) is proving to be a disruptive technology in contemporary healthcare. However, given the sensitivity of the nature of data being shared in this system security, and privacy are critical issues. Attribute-based encryption is a proactive technique for efficient one-to-many data sharing. Specifically, multi-authority-ciphertext policy-attribute-based encryption (MA-CP-ABE) is a suitable method given the multi-stakeholder ecosystem of IoMT-based healthcare. In this work, conventional MA-CP-ABE techniques have been modified to address several existing security limitations. To the best of our knowledge, the proposed work is first to address fault tolerance in MA-CP-ABE, without any redundancy at attribute authority's level and to develop a mechanism for full and partial revocation of compromised authority. A non-monotonic fully hidden access structure further enhances the security of the scheme while efficiently performing encryption/decryption operations even for a large number of attributes, making it suitable for the secure sharing of IoMT data. Inderscience Publishers - linking academia, business and industry through research

Title: Authority revocation scheme for MA-CP-ABE-based secure communication in IoMT ecosystem

Authors: Shardha Porwal; Sangeeta Mittal

Addresses: Department of Computer Science and Engineering and IT, Jaypee Institute of Information Technology, A-10, Sector-62, Noida – 201301, India ' Department of Computer Science and Engineering and IT, Jaypee Institute of Information Technology, A-10, Sector-62, Noida – 201301, India

Abstract: The proliferation of the internet of medical things (IoMT) is proving to be a disruptive technology in contemporary healthcare. However, given the sensitivity of the nature of data being shared in this system security, and privacy are critical issues. Attribute-based encryption is a proactive technique for efficient one-to-many data sharing. Specifically, multi-authority-ciphertext policy-attribute-based encryption (MA-CP-ABE) is a suitable method given the multi-stakeholder ecosystem of IoMT-based healthcare. In this work, conventional MA-CP-ABE techniques have been modified to address several existing security limitations. To the best of our knowledge, the proposed work is first to address fault tolerance in MA-CP-ABE, without any redundancy at attribute authority's level and to develop a mechanism for full and partial revocation of compromised authority. A non-monotonic fully hidden access structure further enhances the security of the scheme while efficiently performing encryption/decryption operations even for a large number of attributes, making it suitable for the secure sharing of IoMT data.

Keywords: key escrow free MA-CP-ABE; attribute revocation; attribute authority revocation; attribute assignment; fault tolerance; internet of medical things; IoMT.

DOI: 10.1504/IJACT.2022.130846

International Journal of Applied Cryptography, 2022 Vol.4 No.2, pp.104 - 120

Received: 12 Apr 2022
Received in revised form: 20 Dec 2022
Accepted: 12 Feb 2023
Published online: 12 May 2023 *

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Title: Authority revocation scheme for MA-CP-ABE-based secure communication in IoMT ecosystem

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