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and way easier to workaround, nothing to cut simply duplicate the wireless signal.

How would you duplicate a wireless signal that contains an “answer” to a changing challenge (e.g. sign this message with the secret key)?

Easy. You do a relay attack.

I.e. instead of comp -> wireless -> device, you go comp -> extender <comp> -> extender <device> -> device -> extender <device> -> extender <comp> -> comp.

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