Sphragis
Confirm it's you.
Keep the key on your device.
Sphragis explores sign-in built around personal presence and a private authentication key intended to stay on the device. These are the design goals of an experimental authenticator.
Experimental · Hardware security and browser sign-in not proven
Who it is for
For research into device-held authentication and deliberate sign-in.
Have a task in mind?
Tell us what you need to achieve and what you already have. Start with a description, without private files or credentials.
Availability, examples and technical limits
Sphragis
Exploring sign-in with a key
that stays on your device.
Sphragis is an experimental authenticator project. Its design calls for authentication keys that cannot be exported from the device and sign-in that requires the person to be present. These are requirements, not verified security guarantees.
Experimental. Not available for public use. Hardware-backed security and browser sign-in are not yet proven.
What the early work shows
A recorded test used simulated USB communication. It does not establish a working hardware authenticator, browser compatibility or certification. No device is offered for sale here.