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Telling the date and time of a recording by listening to the sound?
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Cerebus:

--- Quote from: tom66 on December 20, 2021, 06:43:24 pm ---I think I know:
fd91337f6434fa47a2ff6764f83b7f3ef52f2eec0aa3d93d6cc3adfecc0e89f1

--- End quote ---

What are you claiming? The answer, or how to produce an arbitrary hash collision on demand?  >:D
IanB:

--- Quote from: tom66 on December 20, 2021, 06:43:24 pm ---I think I know:
fd91337f6434fa47a2ff6764f83b7f3ef52f2eec0aa3d93d6cc3adfecc0e89f1

--- End quote ---

Yes, that is it.
tom66:

--- Quote from: Cerebus on December 20, 2021, 06:48:07 pm ---
--- Quote from: tom66 on December 20, 2021, 06:43:24 pm ---I think I know:
fd91337f6434fa47a2ff6764f83b7f3ef52f2eec0aa3d93d6cc3adfecc0e89f1

--- End quote ---

What are you claiming? The answer, or how to produce an arbitrary hash collision on demand?  >:D

--- End quote ---

Hey, if you manage to trivially hash-collide this algorithm, then you'll be a very very wealthy individual indeed.
IanB:

--- Quote from: tom66 on December 20, 2021, 06:43:24 pm ---I think I know:
fd91337f6434fa47a2ff6764f83b7f3ef52f2eec0aa3d93d6cc3adfecc0e89f1

--- End quote ---

And by the way, posting an encrypted answer is definitely one way to conceal it  :)
madires:

--- Quote from: Cerebus on December 20, 2021, 06:46:52 pm ---Assuming we're talking about the same technique one needs historical data to be able to do the timestamping/locating.

--- End quote ---

Yep! Some nerds are running probes collecting and streaming that data for fun. So it's not hard to get everything you need. I wouldn't be surprised if some three letter agencies do that already for decades.
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