Hybrid storage of video on demand content

A computer readable storage medium storing instructions which, when executed on a programmed processor, carry out a process of:

• selecting a plurality of packets for encryption according to a selection criterion, to produce selected packets, wherein unselected packets are designated to remain unencrypted;
• duplicating the plurality of selected packets to produce duplicate packets, wherein the duplicate packets are unencrypted;
• encrypting the selected packets under a first encryption system to produce a first encrypted packets;
• storing the content by storing the unencrypted unselected packets, the first encrypted packets and the duplicate unencrypted packets.

A computer readable storage device for storage and retrieval of digital video content, comprising:

• at least one computer readable storage medium;
• a segment of digital video content residing on the computer readable storage medium, the digital video content comprising:
• a first plurality of packets selected according to a selection criterion, the plurality of packets being encrypted under a first encryption system;
• a plurality of duplicate packets of the first plurality of packets, wherein the duplicate packets are stored unencrypted;
• and
• a plurality of packets that were not selected according to the selection criterion, wherein the plurality of packets that were not selected are stored unencrypted.

A computer data structure representing digital video content, comprising in combination:

• a segment of digital video content divided into a plurality of data packets;
• the data packets being divided into at least three types of data packets as follows:
• a first type of data packet that is selected according to a selection criterion for encryption;
• a second type of data packet that is not-selected according the selection criterion;
• and
• a third type of data packet that comprises duplicates of the first type of data packets,
• wherein, the first type of data packet are encrypted under a first encryption system, the second type of data packet is unencrypted, and the third type is unencrypted.