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InfoResearchPeer-reviewed
Invisible Barrier: Precise Matchmaking Encryption With Keyword Search From Lattices
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Summary
The authors propose QKS-ME, a quantum-resistant matchmaking encryption scheme with keyword search for cloud-based data marketplaces. It supports keyword-based ciphertext filtering and on-demand decryption under bilateral access control, and unsuccessful attempts reveal nothing about plaintext, keywords, or access structures. The paper claims IND-CPA and EUF-CMA security under standard lattice assumptions, and experiments show it is computationally efficient.