The problem
Single sign-on stops at the front door.
Traditional SSO answers one question — who are you? — once, at login. After that it stops asking.
The gap
A token is not a person.
Steal the token and you inherit the identity. Nothing ties that credential to the device it was issued to, or to whether that device is still safe.
The shift
Ask continuously, not once.
Who, on what device, in what state, reaching what — right now. Re-evaluated on every request, not cached from this morning.
Our answer
Bind the proof to the hardware.
Sign-in secrets never leave the secure element. Tokens are cryptographically bound to the device that asked for them — so a stolen one is worthless.