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:
Jan. 06, 2026
Filed:
Jul. 11, 2022
Avago Technologies International Sales Pte. Limited, Singapore, SG;
Sundararajan Chidambara, Austin, TX (US);
Ramakrishna Reddy Jakka, Austin, TX (US);
Sathish Reddy Yenna, Cedar Park, TX (US);
Avago Technologies International Sales Pte. Limited, Singapore, SG;
Abstract
A system for automatic in-band MACsec encryption key updates includes a physical layer retimer device attachable to a host system, the host system connected to a peer device via a secure Ethernet link incorporating egress and ingress channels for encrypted data traffic. The host system generates encryption key updates for each secure egress or ingress channel, sending the key updates in-band as Ethernet packets via the secure egress channels. Key updates are identified and extracted from egress data traffic by the retimer device, which identifies the specific encryption key (e.g., corresponding to a specific egress channel or ingress channel) for which each key update is intended. Security blocks of the retimer device update the appropriate encryption key corresponding to each key update. The retimer device generates an acknowledgement packet for each successful key update, sending the acknowledgement packet back to the host device to confirm the key update.