Patent ID: 11968291
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 24:
25. The method according to claim 22, wherein the method further comprises:
generating a new version of the cryptographic information,
notifying a future use at a change time of the new version of the cryptographic information to the first access devices,
submitting corresponding further access requests for accessing the data by the plurality of access devices to the validator devices in response to said notifying the future use,
validating the further access requests according to the corresponding entitlements,
updating the blockchain by adding further new one or more of the blocks each comprising an indication of one or more of the further access requests in response to a consensus of at least some of the validator devices to a positive result of said validating the corresponding further access requests,
transmitting the new version of the cryptographic information to each of the plurality of access devices in response to the corresponding further new block,
encrypting the data into a new version of the encrypted data according to the new version of the cryptographic information after the change time, and
decrypting the encrypted data into the data according to the new version of the cryptographic information after the change time.