Persistent access control of protected content

US7614077B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Glenn E. Brew · Boca Raton, US
• Marco M. Hurtado · Boca Raton, US
• David Medina · Austin, US
• Jonathan Paul Munson · Putnam Valley, US
• Stefan Nusser · Los Altos, US
• Giovanni Pacifici · New York, US
• Alaa S. You{grave over (s)}sef · Valhalla, US

Key dates

• Filing date: Apr 10, 2002
• Grant date: Nov 3, 2009
• Expiry date: Nov 28, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F21/10
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A system for providing persistent access control of protected content is disclosed. The method on a client system includes sending a first request for authentication of the client to a server system. Subsequently, the client is authenticated by the server. Next, a user on the client attempts to access a file comprising a trailer and content encrypted with an encrypting key. Then, a second request for access to the content is sent to the server by the client, wherein an identifier from the trailer is included in the second request. The identifier identifies the content or an access control policy of the content. The server determines that the second request is in accordance with an access control policy associated with the content, and grants access to the content. Lastly, the client accesses the content in accordance with the access control policy.