Abstract: In order to handle the safety problems in the Identity-based Encryption (IBE) key schemes associated with the existing cloud services, an IBE scheme based on quantum secret keys and cloud service is proposed. First, the quantum encryption technology is introduced to handle the safety problems of information transmission between the private key generator and the cloud services, involving user privacy information and revocation lists, etc. Next, the quantum time token mechanism is proposed to safely distribute and manage users' secret keys. Finally, the user revocation management is safely and effectively achieved by sharing the quantum secret keys and using the cloud services. Comparing with the existing schemes, the proposed scheme can make full use of the advantages of the quantum encryption technology and the cloud computing services. The secret key management and user revocation of the IBE public key scheme can be more safely and effectively done, and multiple safety hazards can be avoided with better safety and practicality in the cloud computing environment. Experimental results in the real quantum key distribution and the cloud computing environment demonstrate the feasibility and effectiveness of the proposed scheme.

Key words: computer application, identity based encryption scheme, quantum key distribution, cloud service, quantum time token