4 ms·

There is a little bit of difference here though. Console copy protection usually doesn't prevent making copies of the media, rather it prevents _using_ those co

There is a little bit of difference here though. Console copy protection usually doesn't prevent making copies of the media, rather it prevents _using_ those copies. It's more of an authentication mechanism. OTOH, video is just pixels and waveforms. If you can get that raw content out somehow, copy protection cannot prevent someone from enjoying that copy (which can then be re-encoded to not have protection). So making video copy protection is much harder because you actually need to prevent copies rather than just make sure the authentication is hard to break.

sandworm101 4y ago
>> which can then be re-encoded to not have protection There are actually a handful of technologies meant to survive the transcription process only to reappear in the new medium. Probably the most effective schemes are used in money, in paper bills. There are little things there (ie the eurion constellation) that are purposely designed to be scanned. They can be copied. But then they are detected by software (Adobe Photoshop) and hardware (high-end printers) which then refuse to edit or reprint them. https://en.wikipedia.org/wiki/EURion_constellation https://en.wikipedia.org/wiki/EURion_constellation Other tech is meant to leave a trail leading back to forgers, a bit like a DVD ripping software embedding your MAC/IP information in any Mp3 it generates. https://en.wikipedia.org/wiki/Machine_Identification_Code https://en.wikipedia.org/wiki/Machine_Identification_Code
- cowtools 4y ago
  I suppose, as long as you use locked down software and hardware. But you will be usually be able to reverse-engineer whatever heuristic they use. >Other tech is meant to leave a trail leading back to forgers, a bit like a DVD ripping software embedding your MAC/IP information in any Mp3 it generates. It is simple: rip the media multiple times with different identifying information, and then analyze the diffs (or just take the average). You cannot hide the existence of steganographic data if there are multiple copies with different steganographic data. It is not like analog where a loss of precision is justifiable
- jabbany 4y ago
  Persistent marks as copy protection doesn't work for media mainly because they deal with the consumption rather than copying side, so just one single non-compliant legacy device spoils the entire thing. As for fingerprinting, that's a whole 'nother can of worms. I've never seen it be used for DRM specifically but it has been successfully used many times to track down who was leaking trade secrets etc. In fact it might be more widely deployed than most people realize. The problem with fingerprinting for DRM would be the plausible deniability of an unsuspecting user "getting hacked" and then their fingerprinted copy ending up as the illegally distributed one without their knowledge or control.
  - MichaelCollins 4y ago
    The movie industry uses something like 'fingerprinting for DRM', adding dots to film prints sent to movie theaters to figure out where bootleg telecining is being done: https://en.wikipedia.org/wiki/Coded_anti-piracy https://en.wikipedia.org/wiki/Coded_anti-piracy
    - jabbany 4y ago
      Does it help though? I feel like bootleg recording hasn't really been affected much...

sandworm101 4y ago

>> which can then be re-encoded to not have protection There are actually a handful of technologies meant to survive the transcription process only to reappear in the new medium. Probably the most effective schemes are used in money, in paper bills. There are little things there (ie the eurion constellation) that are purposely designed to be scanned. They can be copied. But then they are detected by software (Adobe Photoshop) and hardware (high-end printers) which then refuse to edit or reprint them. https://en.wikipedia.org/wiki/EURion_constellation https://en.wikipedia.org/wiki/EURion_constellation Other tech is meant to leave a trail leading back to forgers, a bit like a DVD ripping software embedding your MAC/IP information in any Mp3 it generates. https://en.wikipedia.org/wiki/Machine_Identification_Code https://en.wikipedia.org/wiki/Machine_Identification_Code

cowtools 4y ago
I suppose, as long as you use locked down software and hardware. But you will be usually be able to reverse-engineer whatever heuristic they use. >Other tech is meant to leave a trail leading back to forgers, a bit like a DVD ripping software embedding your MAC/IP information in any Mp3 it generates. It is simple: rip the media multiple times with different identifying information, and then analyze the diffs (or just take the average). You cannot hide the existence of steganographic data if there are multiple copies with different steganographic data. It is not like analog where a loss of precision is justifiable
jabbany 4y ago
Persistent marks as copy protection doesn't work for media mainly because they deal with the consumption rather than copying side, so just one single non-compliant legacy device spoils the entire thing. As for fingerprinting, that's a whole 'nother can of worms. I've never seen it be used for DRM specifically but it has been successfully used many times to track down who was leaking trade secrets etc. In fact it might be more widely deployed than most people realize. The problem with fingerprinting for DRM would be the plausible deniability of an unsuspecting user "getting hacked" and then their fingerprinted copy ending up as the illegally distributed one without their knowledge or control.
- MichaelCollins 4y ago
  The movie industry uses something like 'fingerprinting for DRM', adding dots to film prints sent to movie theaters to figure out where bootleg telecining is being done: https://en.wikipedia.org/wiki/Coded_anti-piracy https://en.wikipedia.org/wiki/Coded_anti-piracy
  - jabbany 4y ago
    Does it help though? I feel like bootleg recording hasn't really been affected much...