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The accepted answer to this question is now outdated, since Whatsapp web does not require an online smartphone to function anymore. How is the key exchange performed securely?

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  • I don't have time to write an answer, but here is the whitepaper. The parts on companion devices apply, I believe.
    – nobody
    Apr 13, 2022 at 22:23
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    “URL signature expired”
    – AKd
    Feb 6 at 13:33

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