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This makes me wonder how would one go about adding an authentication key to audio? We have seen in the past encryption for text shared via email and watermarks

This makes me wonder how would one go about adding an authentication key to audio? We have seen in the past encryption for text shared via email and watermarks embedded in images but I haven't come across something for audio. Happy to hear if someone has worked in this field.

nine_k 6y ago
> adding an authentication key to audio I'm afraid that it's not going to work. Not more than adding an authentication key to handwriting. The voice itself was an authentication key, as was the hand. But now these keys are too weak and easy to forge. I'd say we should completely stop trusting the authenticity of any recorded voice, and maybe all voice by phone. Trust the content, the style, have a set of agreed-upon keywords with your partner and/or your parents to check that the other side is indeed who it alleges to be in an extraordinary situation. Maybe not today, but tomorrow it may happen to be useful to thwart a scam directed against you, with the scammer perfectly imitating the voice of your loved one(s).