3 ms·

My guess is that they don't want to reveal their methods because they are still crude and obvious.

• Gibbon1 4y ago
  Don't want to reveal their methods cause patent infringement.
  • feet 4y ago
    My assumption is that if the methods are shown to be highly inaccurate it could invalidate many criminal prosecutions which could open them up to lawsuits from law enforcement
  • jjeaff 4y ago
    If they are patented then the methods are already public.