Patent EP0862318A2 successfully refreshed from Google Patents.
EP0862318A2
Expired / Lapsed
EP
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Distribution and usage rights enforcement
Assignee: Contentguard Holdings Inc
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Filing: 1998-02-12
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Granted: —
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Expires: 2018-02-12
Abstract
Abstract Described herein is a trusted rendering system for use in a system for controlling the distribution and use of digital works. The 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.
Inventors
- 👤 Mark J. Stefik
- 👤 Glen W. Petrie
- 👤 Steve A. Okamoto
- 👤 Nicholas H. Briggs
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:17
CPC Classifications
G; G06; G06F; G06F21/00; G06F21/10; G06F16/00; G06F16/40; G06Q; G06Q20/00; G06Q20/08; G06Q20/14; G06T; G06T1/00; G06T1/0021; G07; G07F; G07F17/00; G07F17/0014; G07F17/16; H; H04; H04N; H04N1/00; H04N1/32; H04N1/32101; H04N1/32144; H04N21/00; H04N21/80; H04N21/83; H04N21/835; H04N21/8358; G06T2201/00; G06T2201/005; G06T2201/0064; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3225; H04N2201/3233; H04N2201/3236; H04N2201/3269
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
A system for controlling the distribution and use of digital works comprising: means for creating usage rights, each instance of a usage right representing a specific
instance of how a digital work may be used or distributed; means for attaching a created set of usage rights to a digital work including a rendering
right, said rendering right for permitting said digital work to be rendered, said rendering right further
specifying watermark information to be embedded into a rendering of said digital work, said
watermark information including information related to the rendering of said digital work; a communication medium for coupling repositories to enable exchange of repository
transaction messages; a general repository for storing and securely exchanging digital works with attached usage
rights; and a rendering system comprising a rendering repository for receiving a digital work to be
rendered from said general repository and a rendering device for rendering digital works; characterised in that said rendering repository further comprises means for gathering
watermark information specified in a rendering right associated with said digital work to be rendered;
and means for encoding said watermark information for embedding in said rendered digital work.
Claim 2
Dependent Claim
30 words
A system according to claim 1 wherein said rendering right indicates a security level
and watermarking capabilities which a rendering system must have in order to render said digital
work.
Claim 3
Dependent Claim
31 words
A system according to claim 1 or 2 wherein said rendering right is a print right, said
rendering system is a printing system and said rendering repository is a printer repository.
Claim 4
Independent Claim
53 words
A system according to any one of claims 1 to 3 further comprising digital work
authoring means having means for placing a watermark character on a digital document comprising
means for encoding glyph patterns based on said watermark information to create a dynamic
watermark font, wherein said glyph patterns correspond to watermark characters.
Claim 5
Dependent Claim
28 words
A system according to claim 3 wherein said printer repository is further comprised
of means for causing a printing fee to be paid when said document is printed.
Claim 6
Independent Claim
26 words
A system according to any one of claims 1 to 5 further comprising a watermark
extraction means for extracting the watermark information from said digital work.
Claim 7
Dependent Claim
49 words
A system according to claim 6 wherein said watermark extraction means comprises
a scanner device for creating a bit mapped representation of a printed medium; means for locating
said watermark in said bit mapped representation of a printed medium; and means for decoding
embedded data contained in said watermark.
Claim 8
Independent Claim
194 words
A method for providing a watermark on a rendered digital work in a system for
controlling the distribution and use of digital works, the method comprising the steps of: a) a digital work creator assigning a rendering right to said digital work and storing in a
distribution repository, said rendering right specifying watermark information indicating information
identifying a rendering event; b) a user obtaining an encrypted version of said digital work from said distribution
repository and storing in a user repository; c) said user requesting that said digital work be rendered; d) said user repository determining if said digital work has the appropriate rendering
right; e) if said digital work has the appropriate rendering right, said user repository
communicating with a rendering repository to establish a trusted session; f) said user repository transferring said digital work to said rendering repository; g) said rendering repository gathering watermark information specified in said
rendering right; h) said rendering repository encoding data for said watermark information; i) said rendering repository decrypting said digital work and embedding said
watermark information; and j) said rendering repository transmitting said digital work with embedded watermark
information to a rendering device for rendering.
Claim 9
Independent Claim
192 words
A method for providing a watermark on a rendered digital work in a system for
controlling the distribution and use of digital works, the method comprising the steps of: a) a digital work creator assigning a rendering right to said digital work and storing in a
distribution repository, said rendering right specifying criteria for a rendering system that must be
satisfied before the digital work can be rendered; watermark information indicating information
identifying a rendering event; b) a user requesting a rendered version of said digital work be rendered on a user
rendering system having a rendering repository; c) said distribution repository determining if said user rendering system meets the
specified criteria in said rendering right; d) if said rendering system satisfies said specified criteria, said distribution repository
encrypting said digital work and sending to said rendering repository; e) said rendering repository gathering watermark information specified in said
rendering right; f) said rendering repository encoding data for said watermark information; g) said rendering repository decrypting said digital work and embedding said
watermark information; and h) said rendering repository transmitting said digital work with embedded watermark
information to a rendering device for rendering.
References Cited (Backward Citations)
No citation records indexed.
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