How your messages stay private · part 1 of 3 · End-to-end encryption and key exchange
Can Instagram read your DMs?
A message passes the company's server on its way to your friend, and Alice and Bob make the same paint colour as a key without ever sending it, while Eve copies everything. Pick Alice's secret colour: both keys still match, and Eve's mix still misses.
What you turn: Alice's secret colour
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The reel
The full lesson · 7:29
The long version
The same idea, slower: more examples, and pauses to try each step yourself.