Nippon Telegraph and Telephone Corporation

Yasuhiko Yoshimura

Takao Yamashita

Hideo Nishimura

Satoru Furukawa

Yoshihiko Omori

Yurika Suga

A user agent stores a private key and a public key of a user, and user information (registered user information). The user agent receives from a user terminal a service document including identification information of a service provider server and a user information classification requested by the service provider server, and adds a signature to the service document by using the private key of the user. The user terminal receives the signed service document and transmits the signed service document to the service provider server. The user agent receives the signed service document from the service provider server, and verifies the signature and transmits back to the service provider server the user information of the user corresponding to the included user information classification.

User information management system, user information management method, user agent and program

To provide a terminal registration system and a terminal registration method for improving user convenience in registration of a new terminal to a plurality of service sites. The registered terminalincludes an Authenticatorincluding service site list informationthat associates private keys and URLs for access to service sites with each other. A Registration Manageracquires the service site list informationfrom the Authenticatorof the registered terminal. Then, the Registration Managerperforms FIDO authentication for a registration target service site using a private key of the registered terminal, on the basis of the acquired service site list information, and performs Registration of a newly generated cryptographic key at the new terminal

Terminal registration system and terminal registration method

[Problem] To provide a terminal registration system and a terminal registration method for improving user convenience in registration of a new terminal to a plurality of service sites. [Solution] The registered terminalincludes an Authenticatorincluding service site list informationthat associates private keys and URLs for access to service sites with each other. A Registration Manageracquires the service site list informationfrom the Authenticatorof the registered terminalThen, the Registration Managerperforms FIDO authentication for a registration target service site using a private key of the registered terminalon the basis of the acquired service site list informationand performs Registration of a newly generated cryptographic key at the new terminal

[Problem] A terminal registration system and a terminal registration method that enable the number of communication operations between terminals to be reduced are provided. [Solution] The terminal registration systemincludes an existing terminal Aincluding, in a secure area including a TEE, a certificate issuing unitconfigured to issue an owner certificate indicating the owner of the terminal, an existing terminal-side coordination unitconfigured to coordinate terminals having an owner certificate identical to the issued owner certificate and generate a cryptographic key, an authentication key management unitconfigured to manage an authentication private key, and including, in a terminal environment including an REE, an inter-terminal coordination appconfigured to perform inter-terminal communication, a new terminal Bmakes a request for starting encrypted communication using a cryptographic key to the existing terminal Afrom an inter-terminal coordination appon the new terminal Bside, and the existing terminal-side coordination unitof the existing terminal Asends coordination data with the authentication private key encrypted with the cryptographic key to the new terminal Bhaving the identical owner certificate.

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Tokyo, Japan

Yasuhiko Yoshimura