Patent 7353397 was granted and assigned to Adobe Inc. on April, 2008 by the United States Patent and Trademark Office.
Methods and apparatus, including computer program products, implement techniques for repurposing digital information. One or more repurposing constraints are associated with information in an electronic document. A digital signature is associated with the repurposable information and the repurposing constraints. The repurposable information can be repurposed and represented as signed information subject to the repurposing constraints.