公开(公告)号：US20180152307A1

公开(公告)日：2018-05-31

申请号：US15364078

申请日：2016-11-29

Applicant: QUALCOMM Incorporated

Inventor： Ashish Grover ,  Bollapragada Manohar ,  Baranidharan Mutukumaran ,  Zhen Kong

IPC: H04L9/32 ,  H04L29/06

CPC classification number: H04L9/3297 ,  H04L9/3247 ,  H04L63/12

Abstract: Aspects may relate to a device to provide trusted time assurance. The device may comprise: a time clock; an interface; and a processor coupled to the interface. The processor may be configured to operate a trusted execution environment to: receive a request through the interface from a server to send current time; receive a nonce from the server through the interface; sign the current time from the time clock, the nonce received from the server, and device information with an attestation key; transmit the signed current time, nonce, and device information to the server through the interface. The device may then receive an application, a service, or data and a defined period of time from the server through the interface to be available for use for the defined period of time measured by the trusted execution environment.