![]() Nowhere in there does it use your IP or MAC addresses, so whichever friend told you that is probably not a reliable source for tech info. ![]() ![]() I've never used WhatsApp, but Signal lets you link as many devices as you want to your phone number. When your friend wants to send you an encrypted message, they ask the server for the public key(s) registered to your phone number, and they can start encrypting for you. The server registers this public key against your phone number in a big database. ![]()
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