Secure sharing scheme for logistics information based on alliance blockchain and attribute based encryption

In the logistics process, a large amount of private data needs to be stored and shared. In order to solve the problem of secure sharing of logistics information, this paper proposes a secure sharing scheme for logistics information based on alliance blockchain and attribute-based encryption. In this scheme, the alliance blockchain access mechanism ensures that only authorized nodes can join the system, resolving the trust issue caused by third-party center, and the key generation center (KGC) is located on the blockchain to facilitate decentralization. Moreover, ciphertext-policy attribute-based encryption (CP-ABE) encrypts the data address and key in accordance with the access policy, improves fine-grained access control, preserves user access rights, and employs ciphertext keyword search to enhance user privacy and security protection. Finally, the security and performance analysis of the scheme also performs well in terms of communication, storage and computation overheads, effectively achieving the secure sharing of logistics information.