Authorized document usage including rendering a protected...

Details Authorized document usage including rendering a protected... Authorized document usage including rendering a protected...

2000-12-08

2008-08-12

Vaughn, Jr., William C. (Department: 2144)

Electrical computers and digital processing systems: multicomput

Computer-to-computer session/connection establishing

C709S226000, C709S204000, C713S193000, C713S156000

Reexamination Certificate

active

07412519

ABSTRACT:
Access to protected documents is controlled by delegating the decryption from a document source to a document processing device. Interactions between an input device and the document source are provided to generate public and non-commutative proxy keys. The document processing device can use the proxy keys to convert the documents originally encrypted for the owner/publisher/distributor to ones encrypted for the end user. Authorization and usage are combined by invoking a method of trusted rendering of documents. Thus, the proxy conversion and decryption are delayed to a late stage within the document rendering application.

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