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Stage
Calibrate
Streak
Keys this sample
0 / 0
Consistency
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Idle
Stage 0 · Calibrate
Choose the phrase you will teach.
Four words give distinct dwell and flight intervals. Minimum 10 characters. Do not use a real password. Everything runs in this tab; no network request is made.
≥ 10 characters
Level 1–8
Teach. You type the same phrase eight times and the trial keeps what is consistent about how you do it.
Intruder round
Hand the keyboard over. They can see the phrase — that is the point — and they get three attempts.
Your turn
Take it back and type it once. Then both attempts are scored against the same profile.
Stage 1 · Teach · Level 1 of 8
Type it the way you normally would.
Press Enter to submit, Escape to clear the box and start the sample again. Backspaces are legitimate keystrokes and become part of your secret if you repeat them every time — in the product an Escape tap counts the same way, but here it is the reset.
Phantom Keys this sample · 0
Stage 2 · Profile forged
Eight samples collapsed into one envelope.
Means and standard deviations per feature, σ floored at 8 ms. The raw keystroke events that built it were destroyed. What remains cannot be replayed as typing.
Dimensions—
Mean dwell—
Mean flight—
Consistency—
Raw events kept0 B
Stage 3 · Intruder round
Hand the keyboard over. Show them the phrase.
They type exactly what they see. Three attempts. Their trace is drawn against your envelope; bars leaving it turn red. Escape clears the box.
Attempt 1 / 3
Stage 4 · Your turn
Take it back. Type it once.
Your natural rhythm against the profile you taught it. Nothing else is asked for.
One attempt
Stage 5 · Verdict
Intruder · last attempt
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You · authorized
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Same phrase. Different rhythm.
Re-evaluates the recorded attempts. Nothing is retyped.
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—Zero-knowledge
The server would hold ciphertext and an Argon2id hash. It could not read this phrase, and neither could we.
No score, ever
You were told a band and a sentence. The number behind it is the one thing an attacker could tune against.
Never locked out by your body
Amber asks for a retype, then a Backup Code. A broken wrist is an inconvenience, not a lockout.
Rhythm Light
Capture refuses to run without a visible light. That is enforced in code, not in policy.