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    David Kriesel: Traue keinem Scan, den du nicht selbst gefälscht hast

    media.ccc.de

    4 HN recommenders · recommended in 7 months, 2019–2025

    YouTube

    1:03:40 · 7.1M views · Jan 1, 2015

    David Kriesel's 31C3 talk, in German, on the discovery that Xerox scanner-copiers silently replace digits and letters in scanned documents. He explains how the bug stayed unnoticed in the wild for years.

    Called a classic CCC talk, and the Xerox bug is cited as a cautionary tale about trusting scans and digitized archives.

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    9 comments from Hacker News

    1. @solarkraftNov 2021· in “Confused Xerox copiers rewrite scanned documents, expert finds (2013)”

      (2013). The whole ordeal lead to a quite legendary presentation by David at CCC (german, no captions, live translation available but pretty bad): this video If you speak german and haven’t seen this yet, watch it, this is a classic. His talks are all entertaining and interesting.

      Strongly recommendsView on HN
    2. @snicksnakDec 2020· in “RC3 talk: How to survive in spacecraft [video]”

      I would also highly recommend "Traue keinem Scan, den du nicht selbst gefälscht hast" [0] but I just noticed that there are no english subtitles available. [0] this video (2015)

      Strongly recommendsView on HN
    3. @masswerkDec 2022· in “Enhance Speech from Adobe – Free AI filter for cleaning up spoken audio”

      Epic talk (in German, David Kriesel, "Traue keinem Scan, den du nicht selbst gefälscht hast"): this video

      Strongly recommendsView on HN
    4. @masswerkMar 2019· in “DARPA Is Building a $10M, Open-Source, Secure Voting System”

      Thanks for the complementary links! Regarding Xerox scanner compression issues, compare this great CCC-talk by David Kriesel, "Traue keinem Scan, den du nicht selbst gefälscht hast" [0] – Sorry, German only. [0] this video [1] [LINK] (Didn't MS's PDF-viewer have similar issues?)

      RecommendsView on HN
    5. @sdoeringAug 2021· in “Contract by Email”

      This reminded me of a great talk (in German) by David Kriesel about scanners not scanning correctly but replacing letters and numbers because of pattern matching (if I remember correctly). It was a really great talk. Not sure if there is an English version somewhere: this video

      RecommendsView on HN