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Th0mas Blog

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Reversing a Fingerprint Reader Protocol

TLDR: The sensor uses TLS-PSK over USB. We overwrite the PSK and are able to read images. Scan of not-my-finger. I recently got a new Laptop ( Lenovo Ideapad 5 - 15are05 ). Linux compatibility is quite good, as documented in the Arch Wiki . One part that is not working is the fingerprint reader. In this blog post I describe my approach to reverse engineering the fingerprint reader's windows…

TEST PAGE

Heading1 Heading2 Heading3 Heading4 // comment pub fn test(a: u64 ) -> bool { return false ; } this is some quoted text! test f ( x ) = ∫ − ∞ ∞ f ( ^ ξ ) e 2 π i ξ x d ξ f(\relax{x}) = \int_{-\infty}^\infty f\hat(\xi),e^{2 \pi i \xi x} ,d\xi f ( x ) = ∫ − ∞ ∞ ​ f ( ^ ​ ξ ) e 2 π i ξ x d ξ # test def test(a): return sum(a) some more quoted text! with empty lines this is some text with…

About

WIP. My blog. Me: Thomas Lambertz, aka Th0mas. Member of ALLES! . Likes to reverse hardware n stuff.