Method and apparatus for fixing-up the transform part of content efficiently
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A method and an apparatus for efficiently correcting a transformed part of a content are provided to correct a changed content to protect the content from multiple attacks from hackers at the content reproduction starting stage. A method for correcting a content includes steps of confirming information used to correct a transformed part of the content for a first packet of packets constructing the content, extracting position information of a second packet of the packets constructing the content, which includes data for correcting the transformed part of the content, from the confirmed information, and correcting the transformed part of the content by using correction data included in the second packet, which is indicated by the extracted position information.