Patent ID: 7827236

Claim:
A method of delivering a digital media file comprising the following steps: (a) dividing a master version of a digital media file into a first series of time frames and a second series of time frames; (b) delivering the first series of time frames to one or more users without any form of access control, the first series of time frames capable of being used to form a version of the digital media file which is at least one of a group consisting of: incomplete and corrupted; and (c) delivering the second series of time frames to one or more users, the second series of time frames capable of being used in conjunction with the first series of time frames to form a version of the digital media file which is complete and uncorrupted, in which access to the second series of time frames is only granted to users satisfying defined access control criteria, wherein the second series of time frames is transmitted separately from the first series of time frames in response to a user request.