Cashu is a Chaumian ecash protocol built for Bitcoin that enables instant and private Bitcoin payments. In this third quarterly report of the year, we're featuring ongoing developments including libraries and wallet updates, Orchard, a mint management system, developments in decentralized private access to AI, Bitchat, and insights
Cashu is making steady progress, with several exciting new projects underway. This report provides an overview of the most recent updates and advancements from the second quarter of 2025, highlighting Multinut payments, a new Lightning payment type for Cashu wallets, and Chorus, a Nostr app designed for activists and community
The Cashu ecosystem is evolving fast. This report provides an overview of the latest updates and progress in the first quarter of 2025, including new wallets, Cashu integration in payment processors, and updates on projects built on the Cashu protocol. Cashu offers privacy and censorship resistance, making it a powerful
One of the defining properties of Chaumian ecash is the unlinkability of the withdrawal of a coin (issuance) and its deposit (redemption). Various cryptographic methods can be utilized to achieve this across different implementations of ecash, most prominently through blind signatures. Blind signatures are the real innovation in Chaum'
In the 90s, as the old world was first slowly, then rapidly, making way for the new age, technologists, activists, policy makers, and even philosophers knew that as the internet grew—and with it the fraction of our lives that we spend online—the ability of governments and corporations to