PNG supports 8-bit color like GIF, but also supports 24-bit color RGB, like JPG does. They are also non-lossy files, compressing photographic images without degrading image quality.

Specifically, Buchanan demonstrated how he could hide both MP3 audio files and ZIP archives within the PNG images hosted on Twitter.

PNG The Portable Network Graphics format was developed to improve upon the limitations of GIF images, which only allow a limited number of colors.