Based on the structured P2P routing algorithm Kademlia, this paper proposes a new DHT (Distributed Hash Table) mechanism that supports multi-keyword search: kNN-Kad (K Neareast Neighbor Kademlia), which enables the Kademlia network to efficiently perform topic search and multi-keyword search. The kNN-Kad mechanism includes a resource publishing algorithm and a multi-keyword search algorithm. Through simulation, the search time complexity, communication volume, and maintenance cost are analyzed. The results show that the mechanism has higher comprehensive performance than existing algorithms.
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