Methods for adapting the operation of a system in response to the
detection of embedded watermarks from a digital host content are
provided. A digital host content is received and examined for the
presence of watermarks. In response to the detection of embedded
watermarks and in accordance with the value, type, density or spacing of
the detected watermarks, one or more system reactions may take place.
These reactions include conditionally allowing the system to resume its
normal operation, prohibiting the system from resuming its normal
operation, degrading the quality of the digital host content or changing
the security status of the digital host content. In response to the
extraction of weak watermarks that do not meet the desired system
requirements, the extraction operation may be modified or extended to
enable the detection of strong watermarks.