Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2003-11-07
2010-12-07
Agwumezie, Charles C (Department: 3685)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C705S051000, C705S075000, C713S183000, C726S027000
Reexamination Certificate
active
07849016
ABSTRACT:
Systems and methods of distributing and controlling use of data content are provided. Data content is distributed to users by a service provider system, shared between computer system users, or both. In one embodiment, data content is segregated into a plurality of sections, each section is encrypted using a respective one of a plurality of encryption keys, and the resultant plurality of encrypted sections is downloaded to a customer processing platform. In order to control the use of the data content, a plurality of decryption keys corresponding to the plurality of encryption keys are then delivered to the customer processing platform in a manner such that the customer processing platform has possession of at most a subset of the plurality of decryption keys at any time. According to another embodiment, downloaded data content is adapted for use only with a particular software component that establishes a connection with a data content service provider system to obtain permission to use the data content.
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Associated Press, Films to be rented on Internet, Nov. 11, 2002.
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