08-15-2004 | RPOW Launch

Today Hal Finney announced the launch or RPOW - Reusable Proof-of-Work - a concept which never lifted off, but became a milestone in shaping a borderless and permissionless currency.

Announcement: https://nakamotoinstitute.org/rpow/

More about Hal and RPOW: https://bitcoinmagazine.com/culture/the-genesis-files-how-hal-finneys-quest-for-digital-cash-led-to-rpow-and-more