A key built by a crowd
Powers Of Tau runs public trusted setup ceremonies for zero knowledge circuits on Solana. A contributor mixes their own randomness into the proving key in their own browser and destroys it, and the key is safe as long as one of them was honest. The contribution itself is computed by JavaScript in a worker, so this page needs it switched on.
The files are public either way: the circuit, its constraint system and the phase 1 file everything starts from.