What is Distributed Cryptography?

Distributed Cryptography is a digital vault and Bitcoin wallet that runs on your own computer or server. It works on Windows, Mac and Linux, and it also runs in Docker.

You use it from your browser, but the application is on your machine: it is a small local web server that you open at http://localhost:5000. Your keys are created there and stay there, encrypted with your password.

What makes it different

Backups that need agreement. Besides the usual list of words, you can split your wallet secret among people you trust. Nobody can restore it alone. See Consensus Backup.
A plan for when you cannot log in. A Time-Encrypted Vault opens for a group you chose only after a date that you keep moving forward.
Cheaper, more private multisignature. Delegated Multisignature uses Taproot, so a K-of-N payment costs less in fees and shows only the people who signed.
A vault for everything else. Notes, files, passwords and authenticator backups are encrypted with keys that come from the same wallet. See Offline tools.
Anonymous online services. Chat, contacts and groups work through our servers, but you log in with a key of your wallet, not with your name or e-mail, and what you store there is encrypted on your computer first. See What our servers can see.

Two kinds of features

	Needs internet	Examples
Offline tools	No	Encrypted notes, files and passwords, authenticator backups, QR codes, splitting a secret
Online features	Yes, after an anonymous login	Contacts, chat, sending encrypted files, Smart Groups

The Bitcoin wallet itself needs a connection to read balances and to send payments.

Where to start

Install the app.
Create a wallet and write down your words and your password.
Try the offline tools.
Log in anonymously, add a contact and create your first Smart Group.

The source code is public

The code is on GitHub. You can read it, audit it and build it yourself. The terms are in the license.

We rely on these projects, with thanks: