Perc-20 this name sounds like an album from some kind of crypto punk band, but hiding the balance with ciphertext does have that digital cash vibe—finally no need for the whole world to stare at my wallet and count.

Ethereum developers are exploring Perc-20, a token standard that exists in encrypted form, allowing tokens to be held and transferred without revealing balances and transaction details, similar to digital cash. This standard enables the network to verify transaction validity and implement compliance freezes on specific tokens through encrypted blacklists, without exposing regular users' balances or history. As privacy becomes increasingly important in the Ethereum ecosystem, developers are engaging in discussions on system design that balances privacy and regulatory compliance.