Patent ID: 7899306

Claim:
A media data security system for rendering a media data file for output, said system comprising: a data preparation unit configured to generate a list of render operations with respect to a first copy of said media data file to be applied to said media data file, said list of render operations being separate from said media data file, said media data file being associated with authentication data; and a secure data reproducer configured to receive only said list of render operations from said data preparation unit and to render a second copy of said media data file for output on the basis of said list of render operations, said secure data reproducer including a data authenticator configured to detect whether said media data file is authentic, by using said authentication data, the secure data reproducer configured to perform said render operations with respect to the second copy of said media data file, from the received list of render operations, in response to said data authenticator detecting that the second copy of said media data file is authentic.