Layered quantum secret sharing scheme for private data in cloud environment system

Secret sharing is a cryptographic technique that divides secrets into separate stores in order to spread risks and tolerate intrusions. As cloud storage is used by more and more organizations and institutions to store private information, using secret sharing to split private data is a good way to solve the privacy leakage in network transmission and storage. The interaction between several particles in quantum entanglement can encode and distribute secrets, providing a more secure means for the development of secret sharing. Quantum secret sharing (QSS) relies on the uncertainty and non-clonability of quantum mechanics to ensure the security of secrets and eavesdropping monitoring. Using QSS provides a new security strategy for the development of cloud storage. In this paper, we propose a QSS scheme based on multi-particle entanglement to the problem of private quantum information being dispersed on cloud memory, and users can recover private information with permission. In the cloud environment, choosing multiple cloud service providers to decentralize the storage of information is more secure than traditional storage methods, avoiding the cloud server itself to steal secrets. Security analysis shows that even if more than half of the cloud servers are compromised, the secret will not be leaked, and the secret can be restored.