Bitmessage is a peer-to-peer messaging system that doesn't require both participants to be online at the same time to exchange messages: White paper: https://b

Bitmessage is a peer-to-peer messaging system that doesn't require both participants to be online at the same time to exchange messages: White paper: https://bitmessage.org/bitmessage.pdf https://bitmessage.org/bitmessage.pdf [pdf link]