关键词: 域名系统, 根服务器, 根区管理, 联盟式区块链, 注册局

Abstract: The centralized root architecture of Domain Name System (DNS) in the current Internet is accompanied by longterm concerns: on one hand, the country code toplevel domain may be out of control due to the destruction of the root authority function; on the other hand, it is worried that decentralized root alternatives will cause the domain name space to split. The root cause of the above concerns lies in the lack of autonomy and transparency in current and alternative root zone management, leading to a lack of trust in the current root authority or alternative solutions. This paper describes a new DNS root zone management architecture, the root consensus chain, to enhance mutual trust and ease the concerns of all parties. Multiple autonomous registries participate in root zone management in the root consensus chain. Each registry has a country code toplevel domain and root server operators to jointly build a consortium blockchainbased root zone management system. While maintaining a unified name space and a unique global root authority, the root consensus chain improves autonomy through the establishment of a root community by the root consensus chain managers; improves transparency by recording and executing the agreements among the parties and the operation of the root zone. The experimental results based on the real network research testbed show that the root consensus chain can effectively cope with the above concerns, and it has good feasibility and practicability.

Key words: DNS, root server, root zone management, consortium blockchain, registry