Workshop materials

Slides (SpeakerDeck)

Video (Youtube)

Start files

precomputed prefixes
PNG pictures: yes.png / no.png
GIF animation: yesno.gif

References

simple PNG chunk reader/writer: minipng.py
- resulting 'merged' image: final.png
simplified Kaitai grammar for abusive PNG files (starting with a dummy chunk): png_simple.ksy
tiny PNG colliding files: Ken Silverman' most interesting / 3x1 R,G,B => tiny1.png / tiny2.png

Captures

collisions: FastColl / UniColl / HashClashCPC (log)
precomputed collisions: generic PNG / specific header PNG
collisions: GIF w/ FastColl / PNG w/ UniColl

External links