Patent ID: 8615472

Claim:
A method of passing on a virtual product from a first buyer to a second buyer, the method comprising: acquiring, by the first buyer, a predetermined right to an original version of the virtual product from a provider, obtaining, by the first buyer, the original version of the virtual product in a digital form from the provider, the original version of the virtual product having a predetermined quality, selecting the original version of the virtual product obtained from the first buyer and to be passed on to the second buyer, and extracting content identification data identifying the virtual product from the original version of the virtual product; logging in at a server computer and transmitting the content identification data to the server computer; obtaining a personalized copy having a reduced quality, the quality of the personalized copy being reduced compared to the predetermined quality by receiving, from the server computer, the personalized copy of the virtual product having the reduced quality, or receiving transaction data from the server computer, the transaction data uniquely referencing the first buyer, creating, by the first buyer, a copy of the virtual product having the reduced quality, and personalizing the copy of the virtual product having the reduced quality on the basis of the transaction data to obtain the personalized copy having the reduced quality, wherein the personalized copy of the virtual product having the reduced quality contains all information required for becoming a full-value version of the virtual product, the full-value version of the virtual product having a higher quality compared to the reduced quality, and the full-value version of the virtual product being achievable by a key only; passing on only the personalized copy of the virtual product having the reduced quality to the second buyer; and obtaining a reward after the second buyer has acquired the full-value version of the virtual product on the basis of the personalized copy of the virtual product having the reduced quality, wherein a reward is not obtained by the first buyer, when the second buyer has not acquired the full-value version of the virtual product on the basis of the personalized copy of the virtual product having the reduced quality, and wherein the steps of acquiring the predetermined right to the original version of the virtual product, obtaining the virtual product, selecting, logging in, receiving, passing on and obtaining a reward are performed by a first buyer computer.