« #GNUTaler is a free software-based #microtransaction and electronic #payment system. Unlike most other #decentralized payment systems, GNU Taler does not use a blockchain. A blind signature is used to protect the privacy of users as it prevents the exchange from knowing which coin it signed for which customer. »

› https://taler.net/en/ngi-taler.html
› https://en.wikipedia.org/wiki/GNU_Taler