KeySpace is a trustless end-to-end encryption protocol that launched as part of AirSwap Spaces.

What we needed

AirSwap is a hybrid on-chain / off-chain protocol, which requires the coordination of off-chain peer-to-peer messages and on-chain identities (Ethereum addresses & private keys). If I’m chatting online with someone who claims to have control of an Ethereum address, I need to be able to cryptographically validate that they’re telling the truth.

We’ll call this first need off-chain/on-chain identity binding.

Secondly, since communication online is public by default, participants communicating with each other in a peer-to-peer network need to be able to hide their messages from everyone else, without trusting a central authority to coordinate encryption (public key registration). …