Kademlia协议（以下简称Kad）是美国纽约大学的PetarP. Maymounkov和David Mazieres.

在2002年发布的一项研究结果《Kademlia: A peerto -peer information system based on the XOR metric》。

简单的说，Kad 是一种分布式哈希表（DHT）技术，不过和其他 DHT 实现技术比较，如 Chord、CAN、Pastry 等，Kad 通过独特的以异或算法（XOR）为距离度量基础，建立了一种 全新的 DHT 拓扑结构，相比于其他算法，大大提高了路由查询速度。-Kademlia Agreement (Kad) is a New York University' s PetarP. Maymounkov and David Mazieres. In 2002, a study released " Kademlia: A peerto-peer information system based on the XOR metric" . Simply put, Kad is a distributed hash table (DHT) technology, but compared with other DHT implementation technologies, such as Chord, CAN, Pastry, etc., Kad through a unique algorithm to different or (XOR) as a distance measure based on DHT established a new topology, compared to other algorithms, which greatly improves the speed of routing queries.