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.

Date of Patent:
Mar. 22, 2016

Filed:

Jan. 05, 2010
Applicants:

Warren Scott Wainner, Sterling, VA (US);

Sheela D. Rowles, Cupertino, CA (US);

Brian E. Weis, San Jose, CA (US);

David Arthur Mcgrew, Poolesville, MD (US);

Scott R. Fluhrer, North Attleboro, MA (US);

Kavitha Kamarthy, Milpitas, CA (US);

Inventors:

Warren Scott Wainner, Sterling, VA (US);

Sheela D. Rowles, Cupertino, CA (US);

Brian E. Weis, San Jose, CA (US);

David Arthur McGrew, Poolesville, MD (US);

Scott R. Fluhrer, North Attleboro, MA (US);

Kavitha Kamarthy, Milpitas, CA (US);

Assignee:

Cisco Technology, Inc., San Jose, CA (US);

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/08 (2006.01); H04L 29/06 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0833 (2013.01); H04L 9/0891 (2013.01); H04L 63/0428 (2013.01); H04L 63/104 (2013.01); H04L 63/20 (2013.01);
Abstract

Various techniques that allow group members to detect the use of stale encryption policy by other group members are disclosed. One method involves receiving a message from a first group member via a network. The message is received by a second group member. The method then detects that the first group member is not using a most recent policy update supplied by a key server, in response to information in the message. In response, a notification message can be sent from the second group member. The notification message indicates that at least one group member is not using the most recently policy update. The notification message can be sent to the key server or towards the first group member.


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