US 11,941,108 B2
Authentication and control of encryption keys
Timothy R. Paaske, Cupertino, CA (US); Weihua Mao, Monte Sereno, CA (US); and Shu-Yi Yu, Sunnyvale, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Feb. 25, 2022, as Appl. No. 17/652,517.
Application 17/652,517 is a continuation of application No. 16/927,934, filed on Jul. 13, 2020, granted, now 11,263,306.
Application 16/927,934 is a continuation of application No. 16/133,625, filed on Sep. 17, 2018, granted, now 10,713,351, issued on Jul. 14, 2020.
Application 16/133,625 is a continuation of application No. 15/678,502, filed on Aug. 16, 2017, granted, now 10,078,749, issued on Sep. 18, 2018.
Application 15/678,502 is a continuation of application No. 14/696,581, filed on Apr. 27, 2015, granted, now 9,747,435, issued on Aug. 29, 2017.
Prior Publication US 2022/0179944 A1, Jun. 9, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 21/00 (2013.01); G06F 21/44 (2013.01); G06F 21/46 (2013.01); G06F 21/60 (2013.01); G06F 21/85 (2013.01); H04L 9/08 (2006.01)
CPC G06F 21/46 (2013.01) [G06F 21/44 (2013.01); G06F 21/602 (2013.01); G06F 21/606 (2013.01); G06F 21/85 (2013.01); H04L 9/088 (2013.01); G06F 2221/2137 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a peripheral circuit that includes:
an interface control circuit configured to receive a message including a cryptographic keyword and a policy value, wherein the policy value includes an indication of a time period for which the cryptographic keyword is allowed to be used; and
a security circuit configured to:
extract the cryptographic keyword and the policy value from the message; and
delete the cryptographic keyword in response to a determination that the time period has elapsed.