The invention mainly belongs to the technical field of
information security, and specifically relates to a novel decentralized public
key management method and a trusted model. The method is constructed on distributed data network platforms such as a block chain and P2P (
Peer to Peer) in order to ensure that all nodes in the platforms can participate in maintenance of whole-life-cycle management of public keys of users, and the changes of the public keys of the users in various states in a life cycle are recorded in a bill form. Through the method, public keys passing
verification can be recorded and added into a consistent public
key storage structure of a platform to be saved; a public key log chain is generated for all public key records of the same user according to a
time sequence, and an
authentication chain and a trusted network are formed on the basis of a referrer signature; and efficient search of the public keys can be realized on the basis of user identifiers. Through adoption of the method, the public keys of the users can be issued and acquired conveniently and accurately, and the effectiveness,
correctness, consistency and non-fraudulence of acquired public keys are ensured. The method can be taken as an infrastructure supporting
authentication,
encryption, integrity and accountability services.