CueCat PAM Module for Linux
Computers, Software, Bar Code, CueCat - CueCat PAM Module for Linux. The pam_cuecat module reads decoded bar codes from /dev/scanners/cuecat, looks up the username:barcode_type:barcode line in /etc/cuecatpasswd, and returns whether or not this user has been authenticated.
https://pam-cuecat.sourceforge.net/