There are the problems of non-mutual trust

data opacity and easy disclosure in the process of witness sampling and detecting data sharing among the construction department

construction organization

supervision department

detecting department and other departments in power engineering quality management. In this paper

a power engineering detection data secure sharing scheme is proposed. In the scheme

all participating units form an alliance blockchain

and the engineering detection data generated by each unit are stored on and off the chain. In order to ensure data security and sharing

engineering detection data is encrypted into ciphertext

and ciphertext-policy attribute-based encryption（CP-ABE） is used to realize cross department sharing of ciphertext data.The overall scheme can effectively solve the problems of traceability

sharing and privacy protection

and promote the application of engineering detection blockchain.