Security methods for use in a wireless communications system

H - Electricity – 04 – M

Patent

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Details

H04M 1/66 (2006.01)

Patent

CA 2555993

Signal, e.g., message, security techniques are described for wireless systems. A first signal is received by an access node via a wireless link. The signal includes a first authenticator that was generated by the transmitting device, e.g., wireless terminal. The access node determines from an attribute of the signal at least some information known to both the access node and transmitting device but which was not transmitted as part of the message content. The determined information was used by the wireless terminal in generating the first authenticator. The access node sends at least a portion of the first signal including the first authenticator and the determined information to another entity. The entity compares the first authenticator to a second authenticator it generates from the determined information and a secure key which it shares with the transmitting device to determine if the first and second authenticators match.

Des techniques de protection des signaux, par exemple des messages, sont décrites pour des systèmes sans fil. Un premier signal est reçu par un noeud d'accès par l'intermédiaire d'une liaison sans fil. Le signal comprend un premier authentifiant généré par le dispositif de transmission, par exemple un terminal sans fil. Le noeud d'accès détermine à partir d'un attribut du signal au moins certaines informations connues du noeud d'accès et du dispositif de transmission mais n'ayant pas été transmis en tant que partie du contenu du message. Les informations déterminées ont été utilisées par le terminal sans fil dans la génération du premier authentifiant. Le noeud d'accès envoie à une autre entité au moins une partie du premier signal comprenant le premier authentifiant et les informations déterminées. L'entité compare le premier authentifiant à un autre authentifiant qu'il génère à partir des informations déterminées et d'une clé sûre qu'il partage avec le dispositif de transmission pour déterminer si les premier et second authentifiants coïncident.

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