Apple Inc.
Obtaining and using time information on a secure element (SE)

Abstract:

A secure element (SE) with a notion of time useful for checking secure items is disclosed herein. Methods of obtaining time information by the SE include push, pull, opportunistic, local interface, and multi-check methods. Time information can be obtained from a root certification authority (CA) and one or more subordinate CAs, which are associated with and subordinate to the root CA. The SE uses the time information for time management of time values stored in the SE. The SE also uses the time information in cooperation with certificate revocation lists (CRLs) and/or online certificate status protocol (OCSP) stapling procedures.