classu.cash
Cashu is privacy-preserving digital cash using blind signatures
Meet the Characters
Alice
Wants to send money privately
Bob
The mint operator
Carol
Receives the payment
🔑 Key Concept: Blind Signatures
Bob signs tokens without seeing their content, ensuring privacy. The token is a combination of Alice's secret + Bob's signature. When Carol redeems it, Bob can verify it's valid but can't link it back to Alice.
Select a Phase
Phase 1: Minting
Alice creates a secret message and gets Bob (the mint operator) to blindly sign it
Alice
Steps
1
Alice creates a secret message
2
Alice blinds the secret
3
Bob signs the blinded message (without seeing it)
4
Alice unblinds to get a valid token