> qrxfil: file exfiltration across airgaps using QR codes. I'm a little confused about the scenario here, how are you getting qrxfil onto the airgapped system,

> qrxfil: file exfiltration across airgaps using QR codes. I'm a little confused about the scenario here, how are you getting qrxfil onto the airgapped system, and why doesn't that method allow data egress? For example, using ultrasonic audio as a channel allows you (once installed on the target system via a usb device) to invisibly exfil files to devices with no line of sight to the airgapped system. Another method can steganographicly encode files into benign-seeming printed documents.