Media storage structures for storing content, devices for using such structures, systems for distributing such structures

A non-transitory computer readable medium storing a program for receiving different types of content at a device, the program comprising sets of instructions for:

• receiving a plurality of media files, each with a content of a particular type;
• when a first media file with a first content of a first type is received at the device, accessing the first content by decrypting the first content with a first content key, wherein the device decrypts the first content with the first content key each time the device accesses the first content of the first type;
• and
• when a second media file with a second content of a second type is received at the device:
• accessing the second content a first time by decrypting the second content with a second content key;
• discarding the second content key;
• and
• after the second content key is discarded, accessing the second content a second time, subsequent to the first time, by authenticating the second content with a verification parameter by verifying the identity of the content's distribution source.

A system comprising:

• a distribution source for distributing a plurality of media files, each with a content of a particular type;
• and
• a device for receiving and accessing the plurality of media files,
• wherein, when a first media file with a first content of a first type is received at the device, the device accesses the first content by decrypting the first content with a first content key, wherein the device decrypts the first content with the first content key each time the device accesses the first content, and
• wherein, when a second media file with a second content of a second type is received at the device, the device:
• accesses the second content a first time by decrypting the second content with a second content key;
• discards the second content key;
• and
• after the second content key is discarded, accesses the second content a second time, subsequent to the first time, by authenticating the second content with a verification parameter by verifying the identity of the content's distribution source.