Terminal device, signature generation server, simple id management system, simple id management method, and program

A signature generation server comprising:

• an ID information acquisition unit that acquires, from a terminal device capable of registering a simple ID expressed by a combination of numbers or of a number and a specific symbol in first auxiliary information which is managed in association with a user ID for specifying an individual user and which is made a search target at a time of searching for the user ID, the user ID, the simple ID corresponding to the user ID and a generation request for an electronic signature based on the user ID and the simple ID;
• a signature generation unit that generates the electronic signature, by using a signature key, from ID information including the user ID and the simple ID acquired by the ID information acquisition unit;
• and
• a signature providing unit that provides the electronic signature generated by the signature generation unit to the terminal device,
• wherein the electronic signature provided by the signature providing unit is managed in association with the first auxiliary information or the user ID and is registered in second auxiliary information which is not made the search target.

A simple ID management system comprising:

• a terminal device including
• a simple ID registration unit that registers, in first auxiliary information which is managed in association with a user ID for specifying an individual user and which is made a search target at a time of searching for the user ID, a simple ID expressed by a combination of numbers or of a number and a specific symbol,
• a signature generation request unit that provides, to a signature generation server, the user ID input by a user, the simple ID registered by the simple ID registration unit in association with the user ID and a generation request for an electronic signature based on the user ID and the simple ID, and
• a signature registration unit that registers, in second auxiliary information which is managed in association with the first auxiliary information or the user ID and which is not made the search target, the electronic signature provided by the signature generation server in response to a request from the signature generation request unit;
• and
• the signature generation server including
• an ID information acquisition unit that acquires, from the terminal device, the user ID, the simple ID corresponding to the user ID and the generation request for the electronic signature based on the user ID and the simple ID,
• a signature generation unit that generates the electronic signature, by using a signature key, from ID information including the user ID and the simple ID acquired by the ID information acquisition unit, and
• a signature providing unit that provides the electronic signature generated by the signature generation unit to the terminal device.

A simple ID management method comprising the steps of:

• acquiring, from a terminal device capable of registering a simple ID expressed by a combination of numbers or of a number and a specific symbol in first auxiliary information which is managed in association with a user ID for specifying an individual user and which is made a search target at a time of searching for the user ID, the user ID, the simple ID corresponding to the user ID and a generation request for an electronic signature based on the user ID and the simple ID;
• generating the electronic signature, by using a signature key, from ID information including the user ID and the simple ID acquired in the step of acquiring;
• and
• providing the electronic signature generated in the step of generating to the terminal device,
• wherein the electronic signature provided in the step of providing is managed in association with the first auxiliary information or the user ID and is registered in second auxiliary information which is not made the search target.

A simple ID management method comprising the steps of:

• registering by a terminal device, in first auxiliary information which is managed in association with a user ID for specifying an individual user and which is made a search target at a time of searching for the user ID, a simple ID expressed by a combination of numbers or of a number and a specific symbol;
• providing by the terminal device, to a signature generation server, the user ID input by a user, the simple ID registered in the step of registering in association with the user ID and a generation request for an electronic signature based on the user ID and the simple ID;
• acquiring by the signature generation server, from the terminal device, the user ID, the simple ID corresponding to the user ID and the generation request for the electronic signature based on the user ID and the simple ID;
• generating by the signature generation server the electronic signature from ID information including the user ID and the simple ID acquired in the step of acquiring, by using a signature key;
• providing by the signature generation server, to the terminal device, the electronic signature generated in the step of generating;
• and
• registering by the terminal device, in second auxiliary information which is managed in association with the first auxiliary information or the user ID and which is not made the search target, the electronic signature provided by the signature generation server in response to a request of the step of providing by the terminal device.

A program for causing a computer to realise:

• an ID information acquisition function of acquiring, from a terminal device capable of registering a simple ID expressed by a combination of numbers or of a number and a specific symbol in first auxiliary information which is managed in association with a user ID for specifying an individual user and which is made a search target at a time of searching for the user ID, the user ID, the simple ID corresponding to the user ID and a generation request for an electronic signature based on the user ID and the simple ID;
• a signature generation function of generating the electronic signature, by using a signature key, from ID information including the user ID and the simple ID acquired by the ID information acquisition function;
• and
• a signature providing function of providing to the terminal device the electronic signature that is generated by the signature generation function, so as to be managed in association with the first auxiliary information or the user ID and registered in second auxiliary information which is not made the search target.