Existing classical post-processing (CPP) schemes for quantum key distribution (QKD)-based quantum private queries (QPQs) including the $$kN\rightarrow N$$ k N → N , $$N\rightarrow N$$ N → N , and $$rM\rightarrow N$$ r M → N ones have been found imperfect in terms of communication efficiency and security. In this paper, we propose a novel CPP scheme for QKD-based QPQs. The proposed CPP scheme reduces the communication complexity and improves the security of QKD-based QPQ protocols largely. Furthermore, the proposed CPP scheme can provide a multi-bit query efficiently.
Quantum Information Processing – Springer Journals
Published: Jun 18, 2016
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