CashDrop
How it works Privacy Use cases Threat model Create a drop
SHIELDED ZEC · SENT LIKE CASH

The money arrives first. The wallet can come later.

CashDrop seals shielded ZEC inside a private link. Send it in an encrypted chat, print it on a card, slip it in a birthday envelope. Whoever opens it claims it.

Seal your first drop See what they receive
No account. No address swap. Keys never leave your device.
A AdaEnd-to-end encrypted chat
Thanks for helping with the event! Something for you.
cashdrop.example/claim#k7Q2••••••••••
The secret lives after the #. It never reaches a server.
Wait, I don’t even have a wallet yet
That’s the point. It’ll wait for you.

Crypto makes the recipient work first. CashDrop flips it.

THE USUAL WAY
  1. They install a wallet
  2. They write down a seed phrase
  3. They find the right address
  4. They send it back to you
  5. You check the network and address type
  6. Finally, you pay
Six steps, and the person you are paying does five of them.
WITH CASHDROP
  1. You seal an amount
  2. You send the link
  3. They claim it, whenever they are ready
The money is already waiting before they ever open a wallet.
HOW IT WORKS

A one-time envelope, sealed on your device.

01
Seal

CashDrop creates a fresh, single-use shielded envelope locally. You fund it from any Zcash wallet with a normal shielded payment.

02
Send

You get a claim link and a QR card. Share it the way you already talk: an encrypted chat, a printed card, a note in person.

03
Claim

They open it, see the amount verified on-chain, and move it into their own shielded wallet. The envelope is empty after that.

Changed your mind? Until it is claimed, you can take the money back. If you both try at once, the first transaction confirmed on-chain wins.
PRIVACY

The chain sees a shielded transaction. That’s it.

Zcash’s shielded pool does the hiding. CashDrop’s job is to make sure your money never leaves it, and that nothing about the drop ever touches our servers.

We never receive the claim secret, keys, amount, note or address
No analytics, no trackers, no third-party scripts
No accounts, so there is nothing to link to you
BLOCK EXPLORER VIEWMAINNET
TypeShielded (Orchard)
ConfirmedYes
Sender
Recipient
Amount
Note
Was it a CashDrop?

The link is the money.

Share it privately

Anyone holding the full link can claim it. Use end-to-end encrypted chats, or hand over the QR card in person.

Never post it

Not in group chats, not on social, not in a support ticket screenshot. Treat it like a folded banknote.

Leaked? Take it back

If you sent it to the wrong place, reclaim it from your drops before anyone else does.

For every time you’d rather not ask for an address.

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What CashDrop is not

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CashDrop protects the transaction graph. It cannot repair an insecure chat, a compromised phone, or what people choose to say. Prototype software: not reviewed for production use.

Hand someone cash. Through a message.

Create a drop
CashDrop · built on Zcash shielded payments
Threat model ZIP 324 Source code