Distributed extensible access control authorization system and method based on block chain

The invention discloses a distributed extensible access control authorization system and method based on a block chain. According to the scheme, the block chain smart contract is taken as a carrier, a new architecture is provided, a traditional access control model is combined, and the concept of the attribute sequence number value pair and the prefix identifier is introduced to optimize the system strategy retrieval method. According to the architecture level, an intelligent gateway is introduced between a block chain network and each management domain to serve as an access request and data request agent, and equipment registration and attributes are managed by an administrator; according to the intelligent contract level, a strategy implementation contract, a strategy contract and a strategy management contract are designed in the scheme, and authorization management is carried out on access control together; and according to the policy retrieval method level, prefix identifiers are generated for access req