Keita Emura
, Kanazawa University, National Institute of Advanced Industrial Science and Technology
Li et al. (IEEE Transactions on Dependable and Secure Computing 2026) proposed proxy-free public key authenticated encryption with ciphertext update and keyword search (proxy-free PAUKS). In this short note, we demonstrate that keyword information is leaked from updated ciphertexts. We also demonstrate that our attack is effective against the PAUKS scheme proposed by Li et al. (IEEE Transactions on Information Forensics and Security 2023).
BibTeX
@misc{cryptoeprint:2026/1019,
author = {Takeshi Yoshida and Keita Emura},
title = {On the Security of Public Key Authenticated Encryption with Keyword Search with Sender-independent Search Complexity},
howpublished = {Cryptology {ePrint} Archive, Paper 2026/1019},
year = {2026},
url = {https://eprint.iacr.org/2026/1019}
}
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