Build with encrypted data.

Build applications with client-side encryption and live synchronization. Work with JSON on your devices; store encrypted resources on your server.

Choose your starting point

Auth SDK1.1.0

Build an app

Work with JSON. Encrypt and synchronize on the client.

Get started ↗

Core1.0.1

Understand the chain

Create witnesses and verify how a state advances.

Get started ↗

Server1.0.0

Run your backend

Store encrypted resources on your own infrastructure.

Get started ↗

How the pieces fit

The SDK encrypts your data. The server checks witness transitions, stores accepted updates and notifies subscribed clients. Those clients verify and decrypt the changes locally.

Your applicationEncrypt JSON

ULDA ServerVerify & store

Another deviceDecrypt locally

The SDK manages Core chains internally, so you can start with the JSON data API. Need a compatible endpoint? Run the local server.

What stays on the client

Passwords, encryption keys and private origins stay on the client. The server sees IDs, witnesses, ciphertext and traffic metadata. It checks chain progression; it cannot decrypt the data or verify its AES-GCM tag.

ULDA does not provide an account directory or password-reset service. Your application and deployment supply their own account experience and access controls.

Source and licenses

Each component has its own repository, releases and license.

Product	Source	License
Auth SDK	ulda-auth	SDK license
Core	ulda-core	Core license
Server	ulda-server	Server license