Method and apparatus for encrypting/decrypting multimedia content to allow random access

摘要

A method is disclosed for encrypting a multimedia file including parsing the multimedia file to identify a media data portion; encrypting the media data portion; and, combining the encrypted media data portion with a non-encrypted non-media data portion. A method is also disclosed for playing a multimedia file including parsing the multimedia file to identify an unencrypted metadata portion; using the unencrypted metadata portion to locate a position of interest in the media file, the position of interest having an associated encrypted media data portion; and, decrypting the associated encrypted media data portion. An apparatus for performing the methods is also disclosed herein.

主权项

1. A method for encrypting a multimedia file, comprising:
parsing the multimedia file into separate media and non-media portions to identify a media data portion including video frame data including a plurality of video frames, and a non-media portion including header data for the video frame data; encrypting the media data portion without encrypting the non-media portion, wherein each of the plurality of video frames is encrypted regardless of a size of the video frame; combining the encrypted media data portion with the non-encrypted non-media data portion; and outputting the encrypted media data portion combined with the non-encrypted non-media data portion to a player.