Post #3561648
2026-07-03 16:05 UTC
Replies (3)
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@jaseg@chaos.social 2026-07-03 16:08
They wrote up a design doc at the URL below. The gist of it is that they chose a fixed size and error correction level, then unrolled the whole encoding process into a finite circuit, and implemented RS encoding as a linear transformation over GF(2). In effect this is similar to what you'd do in digital circuit design, or mapping an algorithm to a secure multiparty computation implementation. https://github.com/jimparis/qr-font/blob/master/design.md
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@G6eorge@hostux.social 2026-07-03 16:09
@jaseg@chaos.social @revk@toot.me.uk one to get your head around…
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@katalogeur@mastodon.social 2026-07-03 20:02
@jaseg@chaos.social QR codes can be risky. You can't see the URL they're leading you to. Here are some tips on avoiding that risk: https://www.cybersecurity-insiders.com/qr-codes-and-cybersecurity-the-overlooked-risk-in-the-convenience-era/