03-28-1997

[ANNOUNCE] hash cash postage implementation

On this day #[0] announced hash cash — a partial hash collision based postage scheme to fight email spam, which became one of the pieces of Bitcoin puzzle. Thank you, Adam!

"My suggestion is that we have remailers which accept either hash collision postage, or digicash postage."

-- Adam Back

https://cypherpunks.venona.com/date/1997/03/msg00774.html