Security flaw found: keyword information leaked from updated ciphertexts in PAUKS encryption schemes
3d ago· 1 min readenInsight
38/100
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Summary
This short academic note by Takeshi Yoshida and Keita Emura demonstrates a security vulnerability in the proxy-free public key authenticated encryption with ciphertext update and keyword search (proxy-free PAUKS) scheme proposed by Li et al. (IEEE TDSC 2026). The authors show that keyword information is leaked from updated ciphertexts, and that their attack is also effective against an earlier PAUKS scheme by Li et al. from 2023.
Key quotes
· 2 pulledIn 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).
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