Your vault key is an SLH-DSA key (NIST FIPS 205), built only from SHA-256. It lives in this tab: 24 words in, signatures out, nothing sent anywhere. Anyone can put coins in; only a signature from your key takes them out.
Write these 24 words down, in order, on paper. They are the only way into this vault. QDAY cannot recover them, and they are not a wallet recovery phrase.
| Coin | In the vault | Pending yield, ETH | |
|---|---|---|---|
| Open a key to see its holdings. | |||
| Block | What | Amount |
|---|
The digest is read from the vault contract and recomputed here; the page refuses to sign if they differ. Signing takes about a second, in a background worker. Submitting from a wallet: priority fee 0.05 gwei.
Your key is the root of a tree of hashes. A signature reveals one path through it; checking it means hashing up that path, about 2,140 SHA-256 calls on chain. Shor's algorithm breaks elliptic curves and RSA; against SHA-256 a quantum computer has only Grover's square-root speedup, so a 128-bit level stays out of reach.