Patent ID: 7209559
Filing Date: 2007-04-24
Classification: H04N

Abstract:
1. A method for securely distributing a digital copy of a motion picture film from a Film Source Entity (FSE) to a Digital Cinema Theater (DCT) through a distribution center, comprising: (a) generating a studio token at the distribution center, wherein the studio token comprises information utilized to generate a first key; (b) distributing the studio token from the distribution center to the FSE, wherein: (c) generating a theater token at the distribution center, wherein: (d) distributing the theater token from the distribution center to the DCT; (e) accepting a data file at the distribution center from the FSE, wherein the data file comprises: (f) encrypting the data file at the distribution center according to a third key and adding a new header to the encrypted data file; and (g) distributing the further encrypted data file from the distribution center to the DCT, wherein the DCT generates the second key using the theater token and the random number generated by a second random number generator using information provided by the authorization header.