Comments on “Blockchain-Assisted Public-Key Encryption With Keyword Search Against Keyword Guessing Attacks for Cloud Storage”
As a variant of PEKS (Public key Encryption with Keyword Search), Zhang it al. (IEEE Transactions on Cloud Computing 2021) introduced a secure and efficient PEKS scheme called SEPSE, where servers issue a servers-derived keyword to a sender or a receiver. In this paper, we show that information of keyword is revealed from trapdoor when an adversary is allowed to issue servers-derived keyword queries twice.
Authors
- Keita Emura (ORCID: https://orcid.org/0000-0002-8969-3581)
Institutions
- Kanazawa University (JP)
Publication Details
- Journal
- IEEE Transactions on Cloud Computing
- Published
- 2025-09-01
- DOI
- https://doi.org/10.1109/tcc.2025.3604552
- Primary Topic
- Cryptography and Data Security
- Type
- article
- Field-Weighted Citation Impact
- 0.00