A method and system are described for inserting a watermark, including receiving partially encrypted or transformed content, receiving a watermark unit and replacing directly an unencrypted and untransformed portion of the partially encrypted or transformed content with an alternative value, wherein the alternative value has embedded therein watermark signals. Also described are a method and system for watermark detection, including receiving a watermark unit, receiving digital media content, wherein a portion of the digital media content was watermarked, retrieving a plurality of coefficient values from the watermarked content and retrieving bit values of the watermark from the coefficient values.