Patent ID: 7124443
Filing Date: 2006-10-17
Classification: G06Q,G11B,H04L

Abstract:
1. A method of obtaining a decoding key for decoding encrypted content, said method comprising: acquiring, by a second content user from a first content user, a medium on which identification data, the encrypted content, and possibility of resale information are recorded, the first content user having previously accessed and decoded the encrypted content at a first user terminal associated with the first content user; transmitting the identification data and the possibility of resale information to a content use rights management center using a second user terminal associated with the second content user; receiving, from the content use rights management center using the second user terminal, a decoding key based on the transmitted identification data when the content use rights management center determines based on the transmitted possibility of resale information that the content use rights may be sold; and decoding, using the second user terminal, the encrypted content using the decoding key.