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:
Aug. 20, 2013
Filed:
Oct. 30, 2008
Tereza Cristina Melo DE Brito Carvalho, Sao Paulo, BR;
Vlad Constantin Coroama, Bucuresti, RO;
Mats Näslund, Bromma, SE;
Makan Pourzandi, Montreal, CA;
Marcos Antonio Simplicio, Jr., São Paulo, BR;
Yeda Regina Venturini, Votorantin-SP, BR;
Tereza Cristina Melo de Brito Carvalho, Sao Paulo, BR;
Vlad Constantin Coroama, Bucuresti, RO;
Mats Näslund, Bromma, SE;
Makan Pourzandi, Montreal, CA;
Marcos Antonio Simplicio, Jr., São Paulo, BR;
Yeda Regina Venturini, Votorantin-SP, BR;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method of key management in a communication network that includes a plurality of groups with each group including one or several members authorized to have access to key-protected services is provided by an apparatus. The method includes determining when a member starts a switching action from one service to another. A time dependent quantity starting from the switching action is determined. The method includes determining that the member is a member of a switching group when the quantity is less than a threshold value is made, and when the quantity is larger than the threshold, determining that the member has decided to join a new group, and changing the appropriate access key(s).