Vol. I · No. 001Q-Day + 1 edition · speculative
WeatherSUPERPOSEDchance of Q-Day: unknown · p.4

TheQATBOX

PriceUNOBSERVABLEpair $QatBox/SOL · p.7
“All the News Nobody Can See”
Every key is a confessionp.2 Why it's called Qatboxp.3 Forecast: bring a boxp.4 Lost: one private keyp.5 Which box is Alice's?p.6
$QatBoxCA55ENwxBNmGdvxhLqA49CQYNvNTpj7rhBDKY1F7Evpumppump.funX @qcatbox
Special report · the morning after

The keys broke.
The boxes held.

When curve cryptography fell, every wallet that had ever shown its public key became readable overnight. The coins in a box did not. Nobody could forge the seal or see whose coins they were.

By our correspondent, who was not observed
Why “Qatbox”? Q is for quantum. The rest is Schrödinger's cat in a sealed box: nobody can know what's inside until it's opened. Qatbox does the same for your coins. The full story, p.3 →

Qatbox is a sealed box for your coins. You put value in. It's converted to shielded ZEC notes, so the chain records that a box exists but not whose it is or what it holds.

The lid is sealed with a post-quantum signature, ML-DSA backed by hash-based SLH-DSA. It is built on lattices and hashes rather than the curves a quantum computer is expected to break. Only your key opens it, and you choose where it goes when you do.

Until then, there's nothing for anyone to observe. This edition is a speculative demonstration. Nothing here is live.

0/4The box is open
Observer's view
▮▮▮▮▮▮▮▮
Bytes seen: 0
BOXED
Fig. 1 · The box. Contents: unknown.
The Qatbox · Nº 001A speculative edition. Nothing here is live.Page 01 / 08
Vol. I · No. 001WorldPage 2
WorldThe inquiry
Investigation · exhibits A to C

Every key you ever signed with is a confession.

A quantum computer doesn't need your seed phrase. It needs your public key, and most chains have already printed it.

Shor's algorithm turns a public key into a private key. Nobody knows when the hardware arrives. We do know which keys are already sitting in public. This page lets you check yours. It's read-only and needs no wallet connection.

The evidence
CONFESSED
EXHIBIT A

Solana

Your address is your ed25519 public key. It confessed on day one, before you ever signed anything.

IT DEPENDS
EXHIBIT B

Bitcoin

Hidden behind a hash until the first spend, then confessed. Taproot addresses show the key from the start.

ONCE SENT
EXHIBIT C

Ethereum

Your key can be recovered from the signature on any transaction you have ever sent.

A box breaks the chain of evidence. The coins inside sit in shielded notes, and the lid answers only to a post-quantum key. There's no confession to read.

32
bytes

The length of a Solana address. It's also the length of the public key, because they are the same 32 bytes.

Fig. 2 · The confession, actual size
The Qatbox · Nº 001Live chain data · read-only · nothing is storedPage 02 / 08
Vol. I · No. 001SciencePage 3
ScienceWhy it's called Qatbox
Plate 1 · the name, explained

Why it's called Qatbox.

The cat. In 1935, the physicist Erwin Schrödinger imagined a cat sealed in a box. In quantum physics, the cat is alive and dead until somebody opens the lid and looks. It's the most famous image in quantum theory.

The Q. Q is for quantum. It stands for the threat we box against, Q-Day, and the seal we box with, post-quantum signatures.

The box. The point is the box. Nobody outside it can know what's inside, and only opening it settles the question.

Qatbox. We built that box for your coins. The owner, the amount and the destination stay unknown to everyone, including chain analysts and quantum computers, until you open it with your key. Pick an observer on the plate and see for yourself.

“The cat is fine. Probably. We'd rather not check.”The editor
BOX Nº 7C1E…04AFSAMPLE RECORD
EXISTSyes, a box was made✓
OWNER?
AMOUNT?
DESTINATION?
SEALML-DSA-65 · lattice✓
FORGEABLE?no curve to break✓
Observe as
Fig. 3 · Superposed: cat and box at once
The Qatbox · Nº 001Values are illustrativePage 03 / 08
Vol. I · No. 001WeatherPage 4
WeatherThe Q-Day forecast
Outlook · seven days

Chance of Q-Day: unknown.
Bring a box.

Forecasters agree on one thing: it's coming, and nobody knows the date. Keys that are already exposed won't get a warning on the morning it arrives.

Fig. 4 · Exposure pressure. Illustrative.
The Qatbox · Nº 001Forecast is satire. Exposure rules are real.Page 04 / 08
Vol. I · No. 001ClassifiedsPage 5
ClassifiedsLost · found · personals · wanted
Lost

ONE PRIVATE KEY, ed25519, 32 bytes. Last seen inside a public address. No reward, because it was never really hidden.

BOX REF L-001
Found

A BOX. Contents unknown. Owner unknown. The owner will know. Please do not shake.

BOX REF F-007
Lost

MY PRIVACY, somewhere between a CEX withdrawal and a reused address. If found, please do not tell anyone.

BOX REF L-014
Found

A SEED PHRASE on a sticky note, stuck to a monitor. We burned it. You're welcome. Please make a new wallet.

BOX REF F-021
To let

ONE BOX, no windows, no observers, quiet neighbours. Suit a long-term holder.

BOX REF T-004
Personals

LONELY ED25519 KEY seeks hash-based partner who can keep a secret. No curves. Must be one-time only.

REPLY TO BOX 0x31
Personals

SHIELDED NOTE, MATURE, seeks owner. Must be unlinkable. Chain analysts need not apply.

REPLY TO BOX 0x9E
Notice

TO THE ANALYST watching wallet 7xKX…: we saw you not seeing us. Regards, the box.

PAID NOTICE
Personals

QUANTUM COMPUTER, thousands of logical qubits (one day), seeks exposed public keys. Will travel. Boxes need not reply.

REPLY TO NOBODY
Events

CAT VIEWING, every evening at 8. Bring your own key. Nobody else will see anything.

ADMISSION: ONE NOTE
Wanted

KEEPERS. Run the sweep that swaps opening fees into shielded ZEC. Paid in notes. No CV, just show a signature.

INTENDED MODEL · NOT LIVE
Services

ADDRESS REUSE COUNSELLING. First session free. You only ever need one address per spend.

BOX REF S-002
For sale

BRAND-NEW BOXES. Never observed. Post-quantum lid included. Cat not guaranteed.

SEE FRONT PAGE
Wanted

OLD WALLETS, any condition. We'll tell you what a quantum computer would see. Read-only, free, on page 2.

SEE THE INQUIRY
Lessons

SPEAK FLUENT LATTICE in six weeks. Forget everything you knew about curves.

BOX REF E-256
Advertisement
Boxes for every occasion.
Rent. Savings. Love letters. The bag you don't want to talk about.
In memoriam

ADDRESS REUSE, 2009 to Q-Day. Survived by thousands of exposed keys. In lieu of flowers, use a fresh address.

The Qatbox · Nº 001All listings written for this pagePage 05 / 08
Vol. I · No. 001PuzzlesPage 6
PuzzlesToday's brain teaser
Teaser Nº 1 · difficulty: impossible

Which box is Alice's?

Alice boxed 12 ZEC this morning. Six boxes were made in the same block. Tap the one you think is hers.

Answer: you can't tell.

Neither can anyone else. Every box looks the same from outside, with no owner, no amount and no curve. That's the whole product.

The Qatbox · Nº 001Solutions printed nowherePage 06 / 08
Vol. I · No. 001MarketsPage 7
MarketsCommentary · the token
Commentary · intended model, not live

What $QatBox does (and doesn't).

Opening a box costs a small fee, paid from a shielded ZEC note. Fees go to the keepers who run the sweep and, in the intended model, to $QatBox stakers and a buyback on the pair.

Stake $QatBox and your share of opening fees is paid in shielded ZEC, so nobody can tell which staker earned what. That is the token's whole job.

What it doesn't do: it doesn't make your box safer, it doesn't remove the need to trust published code, and it isn't an investment recommendation. Every figure here is a sample.

Pair$QatBox / SOL
PriceNot live
Supply1,000,000,000
CA55ENwxBNmGdvxhLqA49CQYNvNTpj7rhBDKY1F7Evpump
Where a fee goes
You open a boxpay the fee from a shielded note
↓
Opening feeswept by keepers, held as ZEC
↓
Keeperspaid blind
Stakerspaid in ZEC
Buyback$QatBox on the pair

No split is printed because none is set. Not advice.

0
owners observed today

Boxes can be counted. They can't be read. This number stays at zero by design.

Fig. 7 · The only figure that never moves
The Qatbox · Nº 001Intended model. Not live. Not advice.Page 07 / 08
Vol. I · No. 001The fine print · back pagePage 8
The fine printStated plainly
Legal notices · honest ones

What the box hides. What it doesn't.

What we hide

Who owns a box. How much is inside. Where it will go. Any curve-based key that a quantum computer could read.

What we don't

That a box exists. When it was made and opened. The fee that was paid. Your IP address, so use Tor or a VPN. The chain around the box still runs on today's cryptography.

Post-quantum isn't magic

Lattice and hash-based signatures are the current best bet, not a guarantee. Shielded pools are strong privacy, but amounts at the edges can still be correlated.

CORRECTIONAn earlier draft of this page said "invisible". The right word is unobservable. You can see that a box exists, but not whose it is or what it holds.
Letters to the editor

“I put my rent in a box and now I can't stop checking it's still there. Is that normal?” A reader
Ed. Yes. Only you can check, which is rather the point.

“If nobody can see inside, how do I know there's anything in it?” A sceptic
Ed. You can. Your key opens it and verifies the commitment. Everyone else just has to wonder.

NOT LIVE. No real box, payment or proof runs on this site. It's a demonstration. Not affiliated with Zcash, ECC or any other project. Not advice.

Fig. 8 · The box, closed for the night.

Nobody saw
a thing.

Follow @qcatbox
Colophon · Printed by nobody. Delivered in a box. The Qatbox Nº 001 · $QatBox · X: @qcatbox · CA: 55ENwxBNmGdvxhLqA49CQYNvNTpj7rhBDKY1F7Evpump
The Qatbox · Nº 001Keep this paper closed.Page 08 / 08