Rhea Key
Access built on cryptographic proof, not passwords.
Rhea Key is Rhea's cryptographic authentication and approval layer. It replaces password-based login with user-controlled cryptographic authentication, signing and approval.
01 — What it does
Current functions.
Rhea Key currently supports four functions: authentication, signing, connection approval, and approval of sensitive actions inside RED.
Rhea Key currently provides cryptographic authentication and approval in supported Rhea workflows. Broader use across external applications and services depends on planned integrations. Connection to verified identity attributes through Rhea ID is also planned.
Private authentication material remains protected by the user's device and is not transmitted to Rhea. Rhea does not operate a key-recovery service.
02 — Clients
Where Rhea Key runs today.
Rhea Key client availability
| Client | Status | Meaning |
|---|---|---|
| WebStatus: Availablerheakey.com | Status: Available | rheakey.com |
| AndroidStatus: AvailableDevice-based cryptographic authentication and approval | Status: Available | Device-based cryptographic authentication and approval |
| iOSStatus: Coming soonPlanned iOS client | Status: Coming soon | Planned iOS client |
03 — How it works
A trusted device becomes the key.
Authentication and signing
Private authentication material stays protected by the device. Authentication and approvals are signed on-device and verified downstream.
Connection approval
Users approve or reject trusted connection requests instead of relying on shared secrets that can leak.
RED sensitive-action approval
Sensitive actions can require a human approval signed on the user's device using Rhea Key or supported Trezor hardware.
Device-local biometric gate
Biometrics act as a device-local gate to the Rhea Key application. They are not an identity-verification mechanism and are not transmitted to Rhea.
Supported Trezor hardware can be used as an alternative authentication and approval option inside RED. Trezor is a separate third-party device and is not built into the Rhea Key application.