Show HN: PanicLock – Close your MacBook lid disable TouchID –> password unlock

Re:Show HN: PanicLock – Close your MacBook lid disable Touch... by Nexxxeh on Friday April 17, 2026 @08:19PM (#47812004)

There's also the issue that the device is covered in fingerprints, and if you can build a clean image of the print, you can likely manufacture a gelatin copy of that fingerprint that will work on most fingerprint scanners.

I can't speak to the current generation of Apple fingerprint scanners, but historically iirc you can grab a print, clean it up in Photoshop, print it on OHP transparency using a laser printer and use it like a mould to copy a fingerprint.

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Re:Show HN: PanicLock – Close your MacBook lid disable Touch... by disillusioned on Saturday April 18, 2026 @03:08AM (#47813799)

Aren't the current fingerprint scanners ultrasonic rather than optical? I think they rely on the actual physical ridges

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Re:Show HN: PanicLock – Close your MacBook lid disable Touch... by Nexxxeh on Saturday April 18, 2026 @06:48PM (#47820216)

The process uses the depth of the toner layer to make a mould of the physical ridges, which you use to generate a a gelatine cast of them. It's like a single-layer depth 3D print where the medium is fused toner from the laser printer.

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