System for controlling the distribution and use of rendered digital works through watermarking

摘要

A trusted rendering system for use in a system for controlling the distribution and use of digital works. A trusted rendering system facilitates the protection of rendered digital works which have been rendered on a system which controls the distribution and use of digital works through the use of dynamically generated watermark information that is embedded in the rendered output. The watermark data typically provides information relating to the owner of the digital work, the rights associated with the rendered copy of the digital work and when and where the digital work was rendered. This information will typically aid in deterring or preventing unauthorized copying of the rendered work to be made. The system for controlling distribution and use of digital works provides for attaching persistent usage rights to a digital work. Digital works are transferred between repositories which are used to request and grant access to digital works. Such repositories are also coupled to credit servers which provide for payment of any fees incurred as a result of accessing a digital work.

主权项

1. A computer-implemented method executed by one or more distributor-side computing devices for ensuring rendering-side embedding of a watermark in digital content by one or more rendering-side computing devices, the method comprising:
receiving, by at least one of the one or more distributor-side computing devices, information representing an identifier of a rendering-side trust device, the rendering-side trust device being at least one of the one or more rendering-side computing devices that decrypts content internally to thereby prevent entities outside of the rendering-side trust device from accessing keys for decrypting the content; retrieving, by at least one of the one or more distributor-side computing devices, a content decryption key associated with digital content, the digital content being in an encrypted form; and generating, by at least one of the one or more distributor-side computing devices, information to be provided to at least one of the one or more rendering-side computing devices, the information comprising:
information representing an identifier of at least one of the one or more rendering-side computing devices,information representing one or more conditions under which the digital content is permitted to be rendered,information representing a requirement that a watermark is to be embedded in a rendered copy of the digital content, andinformation encrypted with a public key of the rendering-side trust device, the encrypted information comprising information representing the content decryption key.