TECH Signal 386
Duress passcodes explained: How they work and why they can land you in court
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Engineers building or securing mobile software must recognize that this destructive feature is absent from stock Android and iOS, requiring a custom OS installation. Knowing that triggering a duress passcode may be interpreted as obstructing justice helps inform user guidance, policy design, and risk assessment for devices handling sensitive data.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
Entering a duress passcode deletes the disk encryption keys, rendering the stored data unrecoverable.
The feature exists exclusively in GrapheneOS on supported Pixel phones; mainstream Android and iOS do not provide it.
Using a duress passcode during a law‑enforcement stop can result in criminal charges, as shown in a federal case.
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