Netinfo Security

Netinfo Security ›› 2022, Vol. 22 ›› Issue (8): 72-80.doi: 10.3969/j.issn.1671-1122.2022.08.009

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Efficient Blockchain PKI Model Based on MPT Index

HUANG Baohua1(), ZHAO Weihong1, PENG Li1, XIE Tongyi2   

  1. 1. School of Computer and Electronic Information, Guangxi University, Nanning 530004, China
    2. Guangxi Institute of Education, Nanning 530023, China
  • Received:2022-04-11 Online:2022-08-10 Published:2022-09-15
  • Contact: HUANG Baohua E-mail:bhhuang66@gxu.edu.cn

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Abstract:

Aiming at the problems of single point of failure and opaque CA operation in traditional PKI, this paper proposes an efficient blockchain PKI model based on MPT index. Firstly, a decentralized PKI model is constructed by using blockchain as a certificate repository to store certificates and distributed CA nodes as miner nodes in blockchain network to process certificate requests. At the same time, a certificate management algorithm is designed to realize the functions of certificate registration, update and revocation by recording the certificate operation types in certificates. Secondly, on the basis of this model, a MPT index is built for the certificates stored in each block through < certificate ID, certificate Hash > key value pairs, and a certificate query algorithm based on the MPT index is designed, which realizes the function of quickly querying the certificates on the blockchain according to the certificate ID, expands the query semantics of the traditional blockchain, and improves the query efficiency. Comparative analysis and experimental results show that the model proposed in this paper can effectively improve the security of PKI, and has a high efficiency of certificate query.

Key words: blockchain, PKI, MPT

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