Patent ID: 11943345
Assignee: INSPUR SUZHOU INTELLIGENT TECHNOLOGY CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The key management method according to claim 4, wherein the step of acquiring a destination data key on the basis of the attribute information of the key acquisition request information comprises:
acquiring the second encrypted data key corresponding to the key acquisition request information;
decrypting the second encrypted data key according to the access control policy matrix corresponding to the minimum attribute set of the attribute set for encrypting the data key to obtain the first encrypted data key;
decrypting the encrypted project key corresponding to the first encrypted data key with the system root key to obtain the project key; and
decrypting the first encrypted data key according to the project key to obtain the initial data key corresponding to the key acquisition request information, wherein the initial data key is used as the destination data key.