Cadena Signer App
Your on-device key holder and transaction signer. Non-custodial by design, so your secrets stay on your phone while the web app and backend only see what they need: public keys and signatures.
What is the Signer?
The Signer is a mobile companion app that generates and protects your cryptographic keys on-device. It authorizes Cadena actions by producing signatures when you approve them. Keys are never uploaded or shared with Cadena.
- Generates a seed and derives your XPUB and public keys.
- Signs requests for lending/borrowing flows using Discreet Log Contracts (DLCs).
- Pairs to your web account via QR so actions on the site can request signatures from your phone.
Why it’s needed
Cadena is non-custodial. That means you hold the keys and control authorization. The Signer separates identity and UI in the browser from the sensitive key material on your device, reducing attack surface and preserving self-custody.
- Security: private keys never touch the server or the browser.
- Integrity: every critical action requires your explicit approval on the phone.
- Portability: recover on a new device using your seed (keep it safe, offline).
Security model
Keys are generated on-device and stored in secure storage. They never leave your phone.
Cadena only receives your XPUB and signatures—never your seed or private keys.
Every signature is scoped to the exact action you approve, preventing reuse elsewhere.
Ready to keep your keys on your device and use Cadena securely?
