Well, Diffie-Hellman Key Exchange does something similar.
Create a key out of nowhere for 2 parties to boot strap communicate safely. (obviously Diffie-Hellman doesn't solve all problems like knowing who you are actually talking to)
Create a key out of nowhere for 2 parties to boot strap communicate safely. (obviously Diffie-Hellman doesn't solve all problems like knowing who you are actually talking to)
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