A new cryptographic protocol promises to solve Bitcoin's multisig problem by making it invisible.
FROST - Flexible Round-Optimized Schnorr Threshold signatures - moves the logic of multiple signers from the Bitcoin script and into the cryptography itself. On the blockchain, a transaction signed by a five-key vault looks identical to one from a single-key wallet.
Today, anyone can spot a multisig setup on a block explorer, advertising a high-value target. Frostsnap founders Lloyd Fournier and Nick Farrow told Ungovernable Misfits that FROST provides “invisible multisig.” The heavy lifting happens between devices before any signature is broadcast, expanding privacy to include every standard Taproot user on the network.
Lloyd Fournier, Ungovernable Misfits:
- With normal multi-sig, you have to keep around three keys on three different devices and you would have to keep a digital backup of the descriptor.
- If you have two out of the three keys but lose the third one, you actually lose the money.
The shift solves a major user experience failure: the “descriptor” file. Losing this map of public keys, even if you have the hardware devices, renders funds irrecoverable. FROST changes recovery to a simple threshold of physical keys.
Beyond privacy, the structural change lowers costs. Complex on-chain scripts are expensive. A single, clean signature from FROST is cheaper. This makes advanced security setups - like inheritance plans or corporate treasuries - more practical.
Nick Farrow, Ungovernable Misfits:
- It is very elegant mathematics that lets you make a multi-signature through mathematics as opposed to bitcoin script.
- The more we thought about the advantages in things like privacy and transaction fees, the more we saw the potential.
The trade-off is increased complexity under the hood, requiring more coordination between devices to generate a single signature. For users, however, the result is lower fees and a vault that doesn't announce its own existence.
