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:
Jul. 07, 2015
Filed:
Apr. 20, 2012
Jonathan W. Hui, Foster City, CA (US);
Anjum Ahuja, Pearland, TX (US);
Krishna Kondaka, Los Altos, CA (US);
Wei Hong, Berkeley, CA (US);
Jonathan W. Hui, Foster City, CA (US);
Anjum Ahuja, Pearland, TX (US);
Krishna Kondaka, Los Altos, CA (US);
Wei Hong, Berkeley, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In one embodiment, an authenticator in a communication network maintains a persistent authenticator epoch value that increments each time the authenticator restarts. The authenticator also maintains a persistent per-supplicant value for each supplicant of the authenticator, each per-supplicant value set to a current value of the authenticator epoch value each time the corresponding supplicant establishes a new security association with the authenticator. To communicate messages from the authenticator to a particular supplicant, each message uses a per-supplicant replay counter having a security association epoch counter and a message counter specific to the particular supplicant. In particular, the security association epoch counter for each message is set as a difference between the authenticator epoch value and the per-supplicant value for the particular supplicant when the message is communicated, while the message counter is incremented for each message communicated.