HackerDavid Kriesel: Lies, damned lies and scans
Free and Open Source Software Conference (FrOSCon) e.V.YouTube ↗
Archive guide
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.