is this diffie-hellman key exchange?
@aoife Here is one source: https://medium.com/thrive-global/ubuntu-i-am-because-you-are-66efa03f2682
@SuricrasiaOnline Lacking Alice's model of Alice and Bob's model of Bob. Without those the whole sketch makes very limited sense, it seems ;)
@SuricrasiaOnline No worries, it developed itself already while you weren't able to notice anything yet. And there is no way back.