Comment on "RCME: A Reputation Incentive Committee Consensus-Based for Matchmaking Encryption in IoT Healthcare"

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Jiseung Kim, Hyung Tae Lee

Published: 2025, Last Modified: 06 May 2026IEEE Trans. Serv. Comput. 2025EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: Recently, Yang et al. proposed a reputation incentive committee consensus-based matchmaking scheme (IEEE Transactions on Services Computing, 2024), claiming to achieve indistinguishability under adaptive chosen ciphertext attacks (IND-CCA2). In this work, we present a plaintext recovery attack against their scheme under the adaptive chosen ciphertext attack model, analyze the design and proof flaws enabling the attacks, and suggest a countermeasure to achieve the IND-CCA2 security.