A Secure and Efficient Distributed Sharing Scheme with Attribute-Based Searchable Encryption

Due to the explosive growth of electronic education records with highly sensitive nature, the security and authenticity of records have become an urgent issue to be addressed for data sharing. Although the blockchain-assisted searchable attribute-based encryption scheme provides certain trustworthiness for education records sharing, it still suffers from the risk of single key leakage and heavy computational overheads. In this paper, we propose a secure and efficient distributed sharing scheme with attribute-based searchable encryption (SEDS). On the one hand, we design a distributed public key searchable encryption method, which collaboratively generates distributed keys by decentralized blockchain nodes, effectively reducing the risk of single key leakage. On the other hand, we adapt and extend a fast pairing attribute-based encryption method to reduce the computational burden. We evaluate the performance of SEDS through theoretical analysis and experimental verification. The results show that SEDS can not only resist keyword guessing attacks but also reduce encryption and decryption time by 51% and 52% compared to traditional attribute-based encryption schemes, achieving a more secure and efficient education records sharing.