Authentication method

Details Authentication method Authentication method

H - Electricity

04

L

H04L 9/32 (2006.01) H04L 9/08 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2513375

The invention relates to password-based authentication in group networks. Each device (42) has an authentication token irreversibly based on the password. The authentication involves a first device (42-1) at which the password P is entered and a second device (42-2) towards which the authentication occurs. The first device determines a check token Mj for the second based on the password and its own authentication token RI and this check token is sent to the second device, where it is compared with the athentication token of that device. The procedure may include update of a device to exclude a non-trusted device from the group or change the password. Advantageous features are that the information in one device does not allow retrieval of the password and that the password is only exposed at one device, and only temporarily, during the authentication.

La présente invention concerne une authentification basée sur un mot de passe dans des réseaux de groupe. Chaque dispositif (42) comprend un jeton d'authentification qui est basé de manière irréversible sur le mot de passe. L'authentification implique un premier dispositif (42-1) au niveau duquel le mot de passe P est entré et un second dispositif (42-2) au niveau duquel l'authentification a lieu. Le premier dispositif détermine un jeton de vérification M¿j? pour le second dispositif basé sur le mot de passe et son propre jeton d'authentification R¿i?, puis ce jeton de vérification est envoyé au second dispositif où il est comparé au jeton d'authentification de ce dispositif. La procédure peut également consister à mettre à jour un dispositif, afin d'exclure du groupe un dispositif non validé, ou à changer le mot de passe. Cette invention est avantageuse en ce que les informations dans un dispositif ne permettent pas de récupérer le mot de passe et en ce que le mot de passe est seulement présenté à un dispositif, et seulement temporairement, lors de l'authentification.

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