Rappel historique intéressant.

DigiCash est une crypto monnaie qui a été crée dans les années 90. Chiffrement et traçabilité relative (on sait quelle banque émet mais on ne sait pas quel client) mais monnaie totalement centralisée et opaque (pas de logiciel libre).

On trouve d'autres initiatives en https://en.wikipedia.org/wiki/Cryptocurrency :

In 1998, Wei Dai published a description of "b-money", an anonymous, distributed electronic cash system.[21] Shortly thereafter, Nick Szabo created "Bit Gold".[22] Like bitcoin and other cryptocurrencies that would follow it, Bit Gold was an electronic currency system which required users to complete a proof of work function with solutions being cryptographically put together and published.