Patent ID: 7925882
Filing Date: 2011-04-12
Classification: G06Q,G06T,H04N

Abstract:
1. A data application method for distributing a digital content including moving-image data, the data application method comprising: converting, by a processor, first data into encrypted first data by using a plurality of encryption keys, for permitting use of the first data based on predetermined conditions; generating watermarked second data in which an encryption key is embedded, as an invisible electronic watermark, into the second data, the second data being usable unconditionally; compositing and distributing the digital content including the encrypted first data and the watermarked second data; sending use-permission information for the first data to a user in response to a payment of a charge; discounting the charge in response to a time interval, or a count of times, the second data is used; determining whether a user that is a distributee of the digital content satisfies the predetermined conditions for using the first data; and if a result of the determining is that the user satisfies the predetermined conditions for using the first data, allowing the user to use the digital content according to an applicable use method, wherein: first image included in the first data is encrypted with encryption keys that differ image frame by image frame, and a first encryption key with which an initial frame is encrypted is the encryption key embedded into the second data as the invisible electronic watermark; encryption-key generation information specifying logical operations applied on generated encryption keys and on the first encryption key to generate the encryption keys for a second and succeeding frames is included in image headers of corresponding frames in the second data, which is advertising publicity information, and images composing the digital content include: storing time administration information based on use time or use counts for each of the data in a predetermined region of data of each of data portions of a digital content; and outputting, in order to administrate billing, the time administration information contained in the predetermined region of a data portion.