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They could be looking for watermarks or match some 'frame hash' versus a database. The spyware traffic could be measured in single digit bytes.



Yes. A sequence of consecutive hashes would match to a TV show or movie identifier in a local database; and that identifier is all that needs to be uploaded until there's a new TV show or movie identified.


Use one of those perceptual hashing algorithms that work across noise and resolutions. Then you just need a tiny fingerprint sent per scan that can be aggregated across consumers.




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