The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2022
Filed:
Feb. 14, 2020
Cisco Technology, Inc., San Jose, CA (US);
Shwetha Subray Bhandari, Bangalore, IN;
Frank Brockners, Cologne, DE;
Srihari Raghavan, Tamil Nadu, IN;
CISCO TECHNOLOGY, INC., San Jose, CA (US);
Abstract
Systems, methods, and computer-readable media for authenticating time sources using attestation-based techniques include receiving, at a destination device, a time reference signal from a source device, the source and destination devices being network devices. The time reference signal can include a time synchronization signal or a time distribution signal. The destination device can obtain attestation information from one or more fields of the time reference signal and determine whether the source device is authentic and trustworthy based on the attestation information. The destination device can also determine reliability or freshness of the time reference signal based on the attestation information. The time reference signal can be based on a Network Time Protocol (NTP), a Precision Time Protocol (NTP), or other protocol. The attestation information can include Proof of Integrity based a Canary stamp, a hardware fingerprint, a Secure Unique Device Identification (SUDI) of the source device, or an attestation key.