How end-to-end encryption works: why even WhatsApp cannot read your messages
Group chats with end-to-end encryption: who makes the copies?
In an end-to-end encrypted group of six people, every message must reach five other phones. The server cannot read any of them. Who makes all those copies?
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You start a group for the gift: you, Miva and four friends. Rono, of course, is left out.
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Every message must now reach the five other phones, and the server in the middle still may not read a word. So who makes the five copies, and how do you copy a message that nobody on the way can open?
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