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InfoResearchPeer-reviewed
Matching Comes First: Efficient Certificateless Lattice-Based Bilateral Access Control With On-Demand Matching
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Summary
This paper introduces CLLME, a certificateless lattice-based matchmaking encryption scheme for bilateral access control in data sharing. Both senders and receivers specify matching access structures, so decryption requires mutual authorization, and a lightweight authenticity check filters out irrelevant ciphertexts before costly decryption. The authors prove indistinguishability against chosen-plaintext attacks and existential unforgeability against chosen-message attacks under lattice-based assumptions, and report favorable communication and computation efficiency.