![]() ![]() When you add encryption to a circuit-switched call of that sort, as analogue phone scramblers did, the easiest way to do it is also end-to-end. If the recipient wasn’t there, the call couldn’t be saved for later – it simply didn’t happen. The sound went from your mouthpiece, down a long and possibly very convoluted electrical circuit, right into the earpiece of the recipient. When you communicate with someone over the internet, person-to-person, it’s easy to imagine that the message travels like an old-school phone call.Īnalogue phone calls weren’t encrypted, and they could be eavesdropped, but they really were end-to-end communications. ![]()
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