David Kriesel: Lies, damned lies and scans
Free and Open Source Software Conference (FrOSCon) e.V.2 HN recommenders · recommended in 2 months, 2020-2026
58K views · 11 years ago · talk · evergreen
David Kriesel's FrOSCon talk on how Xerox scancopiers, due to JBIG2 compression, silently replaced digits in scanned documents. He walks through how he discovered the bug and why it is so dangerous.
The standard reference whenever HN discusses the Xerox scanner bug or AI and compression that fabricates content.
1:03:40David Kriesel: Traue keinem Scan, den du nicht selbst gefälscht hast
media.ccc.de
7M views • 11 years ago
44:29Breaking the x86 Instruction Set
Black Hat
381K views • 9 years ago
1:02:52Joanna Rutkowska: Towards (reasonably) trustworthy x86 laptops
media.ccc.de
27K views • 10 years ago
1:03:45How We Diagnosed and Fixed the 2023 Voyager 1 Anomaly from 15 Billion Miles Away
Flight Software Workshop
17K views • 1 year ago
45:14DEF CON 19 - Artem Dinaburg - Bit-squatting: DNS Hijacking Without Exploitation
DEFCONConference
4K views • 13 years ago
1:05:51LibreSSL: The first 30 days, and what the Future Holds
Andrea Ross
5K views • 12 years ago
45:50"The Mess We're In" by Joe Armstrong
Strange Loop Conference
398K views • 12 years ago
45:14DEFCON 19: Bit-squatting: DNS Hijacking Without Exploitation (w speaker)
Christiaan008
24K views • 14 years ago
53:09DEF CON 23 - Zoz - And That's How I Lost My Other Eye...Explorations in Data Destruction (Fixed)
DEFCONConference
533K views • 11 years ago
1:44:18Browser hacking: Let's make "Cookie Clicker" playable in Ladybird!
Andreas Kling
15K views • 4 years ago
37:02DEFCON 21 - DNS May Be Hazardous to Your Health - Robert Stucke
Robert Stucke (bobhex)
20K views • 13 years ago
1:05:45LibreSSL with Bob Beck
Jason Tubnor
25K views • 12 years ago
18:20FIXING the ENTIRE SM64 Source Code (INSANE N64 performance)
Kaze Emanuar
3.2M views • 4 years ago
46:04DEF CON 26 - Christopher Domas - GOD MODE UNLOCKED Hardware Backdoors in redacted x86
DEFCONConference
86K views • 8 years ago
59:2328c3: The Science of Insecurity
28c3
42K views • 14 years ago
21:20Cracking Enigma in 2021 - Computerphile
Computerphile
2.9M views • 5 years ago
56:19MINIX 3: a Modular, Self-Healing POSIX-compatible Operating System
FOSDEM
90K views • 16 years ago
10:58Flaw in the Enigma Code - Numberphile
Numberphile
5.4M views • 13 years ago
1:04:36J B Rainsberger Integrated Tests Are A Scam HD
Christopher Cabanne
49K views • 11 years ago
52:51DEF CON 22 - Zoz - Don't Fuck It Up!
DEFCONConference
546K views • 11 years ago
5 comments from Hacker News
> OCR for construction documents does not work I'm reminded of the Xerox JBIG2 bug back in ~2013, where certain scan settings could silently replace numbers inside documents, and bad construction-plans were one of the cases that led to it being discovered. [0] It wasn't overt OCR per se , users weren't trying to convert pixels to characters. [0] ▶ this video
Even though this happened a long time ago, whenever I hear or think about it, I am a mazed that it didn't put Xerox out of business, or at least hurt a little more. After all, some big players were already doing digital archiving at the time. :-/ BTW, the CCC had a pretty neat presentation at that time as well: ▶ this video
There is a version with an English voice over of the original talk here: link And the talk he gave in English himself here: ▶ this video
Sounds like the next iteration of "Lies, damned lies and scans": ▶ this video >On the scale of things too horrible to contemplate, "document-altering scanner" is right up there with "flesh-eating bacteria". Since 2006, Xerox scancopiers literally are making stuff up. They, for example, replace digits with others in scans.
> You may remember that this played a strange role in Obama's birth certificate some years back Just to clarify, the issue with the compression algorithm used by the scanner, not with the PDF format itself. There a few videos of David Kriesel explaining the bug for the curious: ▶ this video