PM-ABE: Puncturable Bilateral Fine-Grained Access Control From Lattices for Secret Sharing

In the era of flourishing sustainable smart cities, with the accessibility of Internet and the persistent evolution of distributed computing, there is an increasing reliance on cloud/fog computing environments and online data storage platforms for secure data sharing. However, existing cryptographic schemes fall short in simultaneously satisfying security requirements such as bilateral fine-grained access control, resilience to quantum attacks, assurance of the authenticity of decrypted data, and forward security for historical data. To tackle these challenges, we propose the innovative puncturable attribute-based matchmaking encryption scheme based on lattice cryptography. The method adeptly satisfies the aforementioned stringent security requirements concurrently, offering a triple-layered assurance for the secure implementation of secret sharing. The receiver, unable to successfully decrypt, remains uninformed about any specifics regarding ciphertexts and the access policy. Our PM-ABE scheme has manifested resilience against quantum attacks, collusion attacks, chosen plaintext attacks and ensuring unforgeability under chosen message attacks. Furthermore, our comprehensive efficiency analysis substantiates that our scheme maintains a favorable level of computational efficiency and storage consumption.