Patent ID: 11941108
Assignee: APPLE INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A method, directed to a computing system, comprising:
receiving, by a security circuit, a message that includes a cryptographic keyword and a policy value, wherein the policy value includes one or more data bits indicative of one or more policies that define allowable usage of the cryptographic keyword;
extracting, by the security circuit, the cryptographic keyword and the policy value from the message;
determining, by the security circuit based on the policy value, a time period for updating a revocation list;
after the time period has elapsed, updating, by the security circuit, the revocation list; and
in response to determining that the cryptographic keyword is on the updated revocation list, deleting, by the security circuit, the cryptographic keyword.