A method, system, and apparatus are provided for securely accessing a digital work, such as digital movie, music file, photo, or other type of digital media. Provider contexts, requester contexts, and exporting contexts exchange logic statements as defined by a distributed logic-based programming language....http://www.google.fr/patents/US7184985?utm_source=gb-gplus-shareBrevet US7184985 - Method, system, and apparatus for providing secure access to a digital work
Method, system, and apparatus for providing secure access to a digital work
