Program license key issuing method and issuing system

A seller computer which requests the issuance of a license key to a license-issuing computer in response to a request from a purchaser computer through a network, the seller computer including:

• a program which requests the inputting of client information, product information and license program information to the purchaser computer through the network,
• a program which receives the client information, the product information and the license program information from the purchaser computer through the network and transmits the product information and the license program information to the license-issuing computer, and
• a program which receives the license key from the license-issuing computer and transmits the license key to the purchaser computer;
• A seller computer which requests the issuance of a license key to a license-issuing computer in response to a request from a purchaser computer through a network, the seller computer including:
• a program which requests the inputting of client information, product information and license program information to the purchaser computer through the network,
• a program which receives the client information, the product information and the license program information from the purchaser computer through the network and transmits the product information and the license program information to the license-issuing computer, and
• a program which receives the license key from the license-issuing computer and transmits the license key to the purchaser computer;

A seller computer which requests a trial license key which allows the use of a program for a given period and a special license key which extends a trial period of the trial license key to a license-issuing computer in response to a request from a purchaser computer through a network, the seller computer including:

• means for inputting a product number, a license program name and a trial license key communicated from a purchaser,
• means for outputting the license key received from the license-issuing computer,
• a program which requests the inputting of the client information, the product number and the license program name to the purchaser computer through the network,
• a program which receives the client information, the product information and the license program information from the purchaser computer through the network and transmits the product information and the license program information to the license-issuing computer or transmits the product number, the license program name and the trial license key inputted by the inputting means to the license-issuing computer, and
• a program which receives the trial license key from the license-issuing computer and transmits the license key to the purchaser computer or receives the special license key from the license-issuing computer and outputting the special license key from the outputting means.

A data transfer method of a seller computer requesting the issuance of a license key to a license-issuing computer in response to a request from a purchaser computer through a network, the data transfer method including

• a step in which the seller computer receives client information, product information and license program information from the purchaser computer,
• a step in which the seller computer transmits the product information and the license program information to the license-issuing computer,
• a step in which the seller computer receives a license key from the license-issuing computer, and
• a step in which the seller computer transmits the license key to the purchaser computer.

A data transfer method of a seller computer requesting the issuance of a license key to a license-issuing computer in response to a request from a purchaser computer through a network, the data transfer method including:

• a step in which the seller computer receives client information, a product number and a license program name from a purchaser computer,
• a step in which the seller computer transmits the product number and the license program name to the license-issuing computer,
• a step in which the seller computer receives a trial license key which allows the use of the program for a given period from the license computer,
• a step in which the seller computer transmits the license key to the purchaser computer,
• a step in which the seller computer inputs the client information, the product number, the license program name and the trial license key communicated from a purchaser therein,
• a step in which the seller computer transmits the product number, the license program name and the trial license key to the license-issuing computer,
• a step in which the seller computer receives a special license key for extending the deadline of the trial period by the trial license key from the license-issuing computer, and
• a step in which the seller computer outputs the special license key and transmits the special license key to the purchaser.

A licensing issuing method of a license issuing system comprising a license-issuing computer, a seller computer, a purchaser computer, and a network which connects the license-issuing computer, the seller computer and the purchaser computer, wherein

• the license-issuing computer requests the inputting of client information, product information and license program information to the purchaser computer through the seller computer,
• the purchaser computer transfers the client information, the product information and the license program information to the seller computer in response to the request from the license-issuing computer,
• the seller computer transfers the product information and the license program information out of the client information, the product information and the license program information received from the purchaser computer to the license-issuing computer, and
• the license-issuing computer issues a license key for a program specified by the license program information to the purchaser computer through the seller computer when the authentication of the product information received by the seller computer is normally finished.

A license issuing method of a license-issuing computer which is connected to a network and performs the issuance of a license key through the network, the license issuing method including:

• a step in which the license-issuing computer receives product number and a license program name out of client information, the product number and the license program name which a purchaser inputs from a seller computer through the network,
• a step in which the license-issuing computer performs the authentication of the product number,
• a step in which the license-issuing computer issues a trial license key which allows the use of a program specified by the license program name for a given period when the authentication is normally finished,
• a step in which the license-issuing computer receives the product number, the license program name and the trial license key out of client information, the product number, the license program name and the trial license key which a purchaser inputs from the seller computer through the network,
• a step in which the license-issuing computer performs the authentication of the trial license key, and
• a step in which the license-issuing computer issues a special license key which extends a trial period by the trial license key when the authentication is normally finished.

A license issuing method of a license-issuing computer which is connected to a network and performs the issuance of a license key through the network, the license issuing method including:

• a step in which the license-issuing computer receives a product number and a license program name which a purchaser inputs through the network,
• a step in which the license-issuing computer performs the authentication of the product number,
• a step in which the license-issuing computer issues a trial license key which allows the use of a program specified by the license program name for a given period when the authentication is normally finished,
• a step in which the license-issuing computer receives the product number, the license program name and the trial license key which the purchaser inputs through the network,
• a step in which the license-issuing computer performs the authentication of the trial license key, and
• a step in which the license-issuing computer issues a paid license key which exhibits a higher function as the trial period becomes shorter.