Identity-based key generating methods and devices

Details Identity-based key generating methods and devices Identity-based key generating methods and devices

H - Electricity

04

L

H04L 9/28 (2006.01)

Patent

CA 2593414

A method and device for generating public key and private key in the anti- symmetrical secret key pair based on the user identifier. The secret key management center generates the public/private key-computing basis and discloses the public key-computing basis. Based on the identifier provided by the user, the user~s private key is computed and supplied to the user. Any user can compute the other user~s public key based on the identifier of the other user and the issued public key-computing basis. In this way, the public key of partner with which communicated is obtained without the certification from the third party CA and without maintaining the parameters associated with a plurality of users.

L'invention concerne un procédé et un dispositif pour générer une clé publique et une clé privée dans la paire de clés secrètes antisymétrique sur la base de l'identifiant d'utilisateur. Le centre de gestion des clés secrètes génère la base de calcul de clé publique/privée et diffuse la base de calcul de clé publique. Sur la base de l'identifiant fourni par l'utilisateur, la clé privée de l'utilisateur est calculée et fournie à cet utilisateur. N'importe quel utilisateur peut calculer la clé publique d'un autre utilisateur sur la base de l'identifiant de cet autre utilisateur et de la base de calcul de clé publique émise. Ainsi, la clé publique du partenaire de communication est obtenue sans la certification du tiers CA et sans la mise à jour des paramètres associés à une pluralité d'utilisateurs.

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