Patent ID: 8245286

Claim:
An information processing device comprising: a storage device configured to store a predetermined program which causes a computer, that is connectable to the information processing device, to communicate with the information processing device using a secret key and a public key; an acquiring unit configured to acquire a product key of the predetermined program and first identification information of the computer from an activation request received from the computer, said activation request including the product key and the first identification information, said product key being issued when a license of the predetermined program is purchased, said first identification information physically and uniquely identifying the computer; a recording unit configured to record, in the storage device, when a license authentication with respect to the product key, performed based on the product key and the first identification information in response to the activation request, is successful, a pair of the product key and the first identification information, together with second identification information that is unique to the pair of the product key and the first identification information; and a certificate generating unit configured to generate, for each second identification information, an individual certificate package including a secret key and a public key that are unique to each second identification information, and to record the individual certificate package in the storage device in correspondence with each second identification information, based on third identification information included in an issuance request for the individual certificate packet received from the computer in response to sending the second identification information to the computer, said third identification information being generated in the computer by performing a reversible conversion with respect to a combination of the second identification information and a common model identifier that identifies the predetermined program.