An attribute-based encryption privacy-preserving algorithm for multi-return logistics and distribution targets

In multi-return logistics, multiple participants are involved, each with different access rights. Various stages require the sharing and exchange of distribution target information. The dynamic change and revocation of permissions increase the risk of privacy leakage. To protect personal privacy and customer data security, this paper proposes a privacy protection algorithm based on attribute-based encryption (ABE) for multi-return logistics targets. The algorithm establishes a privacy protection platform using ABE and multiple authorization centers. It initializes distribution target information via bilinear mapping and group theory. Keys are generated using polynomial interpolation and expressed as bit strings. Target privacy information is encrypted via a gated access structure. Access is granted only if the visitor’s attributes satisfy the policy, in which case the ciphertext is decrypted and delivered. Additionally, a Non-monotonic Access Policy (NAP) mechanism is introduced to dynamically revoke user access rights and update permissions, enhancing the security of private information. Experimental results show that the proposed algorithm achieves high privacy protection security with low computational complexity.