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Chaumian ecash, a privacy-preserving payment system, was conceptualized in the early ’80s and known to be the first cryptocurrency ever invented. Although this technology experienced a period of dormancy, the advent of Bitcoin has revived interest in this technology. As we stride into an era increasingly concerned with digital privacy, ecash is experiencing a renaissance, primarily due to our discovery of Bitcoin as the foundational money layer for the internet.
Cashu allows the use of ecash on Bitcoin, empowering ordinary users to operate a mint that is connected to the Lightning Network. This enables everyone to offer perfectly private, untraceable Bitcoin payment services to their peers, social circles, or larger communities.
Chaumian mints use a technique known as blind signatures, which obscure user activities from t
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