A secret goes in. n pieces come out. It takes k of them in one room to get it back, and it takes nobody's permission.
There is no key here, no administrator, and no account. The seal is arithmetic, so there is no one to lean on and no one who could let you in early even if they wanted to. Below quorum the thing is not merely locked. It is genuinely undetermined, and every possible answer is still exactly as true as the real one.
All of it runs in your browser. Nothing is uploaded, nothing is stored, and there is no wallet to connect. Read the specification if you would rather check than believe.
the rooms
shardsDestroy a secret into n pieces. Any k of them bring it back; any k−1 bring back nothing at all.working tool
attestPresent what you hold. Enough of it in one place and the thing opens by itself.working tool
latticeEvery arrangement of holders, drawn, sorted into the ones that open it and the ones that do not.diagram
entropyThe randomness every shard is hidden behind, running live. There is nothing to see in it, which is the point.live
sealedThe register of things struck here that cannot be read, including by whoever struck them.local only
the vaultThe aperture at the end of the hall. Shut, which is not the same as locked, and weaker things are locked.shut
specThe scheme, the wire format, the threat model, the test vectors, and the list of what this does not defend against.11 sections