# Cashu

> Chaumian eCash on Bitcoin. Blinded signatures = zero-knowledge balance for the mint. Settled on Lightning.

**Canonical URL:** https://xmr.club/wallets/cashu
**Category:** wallets / eCash
**Grade (xmr.club rubric):** B
**KYC posture:** anonymous_signup
**Features:** custodial, open_source, lightning_native
**Highlights:** E-CASH, LIGHTNING, PRIVACY
**Fees:** Mint-fee varies · Lightning settle · Chaumian privacy
**Website:** https://cashu.space
**Last verified:** 2026-05-13
**Uptime probe:** up (HTTP 200, 868ms) · checked 2026-05-13T10:07:28.616Z

## Editorial review

Cashu protocol implements David Chaum's 1980s eCash on top of Bitcoin/Lightning. The mint holds funds in Lightning channels but can't see who has how much — blinded BDH signatures break the link between deposit and withdraw. Multiple clients (Nutshell ref impl, Minibits, eNuts, Cashu.me) and many public mints. Trade-off: you trust the mint operator not to disappear with funds; in exchange you get instant offline-capable e-cash with no chain footprint per spend.

## Citation

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