Security analysis on blockchain-based public key encryption with keyword search for medical data sharing in cloud environment
Banik and Kumar (Journal of Information Security and Applications 2023) proposed a blockchain-based public key encryption with keyword search for medical data sharing in cloud environments. In this comment paper, we show that the Banik-Kumar scheme leaks keyword information from both ciphertexts and trapdoors.
Authors
- Keita Emura (ORCID: https://orcid.org/0000-0002-8969-3581)
- Kazumasa Omote (ORCID: https://orcid.org/0000-0002-1371-4454)
Institutions
- Kanazawa University (JP)
- University of Tsukuba (JP)
- National Institute of Advanced Industrial Science and Technology (JP)
Publication Details
- Journal
- Journal of Information Security and Applications
- Published
- 2026-08-25
- DOI
- https://doi.org/10.1016/j.jisa.2026.104610
- Primary Topic
- Cryptography and Data Security
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Japan Society for the Promotion of Science