The invention provides a block chain-based
large model use
traceability and
access control method and
system, and belongs to the technical field of block chains, and the method comprises the steps: extracting key version information of a
large model, encrypting the key version information, storing the encrypted key version information to a block
chain network, and generating a model evidence
storage record; generating a dynamic
watermark identifier based on the user identity identifier, the calling
timestamp and the model evidence
storage record, and embedding the dynamic
watermark identifier into an output result of the
large model; monitoring calling behavior data of the large model in real time through an intelligent contract in the block
chain network; and when abnormal calling behavior data is detected, tracing the source of the abnormal calling behavior data based on the dynamic
watermark identifier and the model evidence
storage record, and executing permission limiting operation through the
smart contract. According to the method,
full life cycle protection and calling
traceability management of the large model are realized based on the block chain evidence storage, the dynamic watermark identifier and the intelligent contract, so that effective
traceability management and
access control are realized in the use process of the current large model.