QR codes ( 2 dimensional bar codes are queer ducks ). They can be read by smart phone cameras , web cams , tablet cams, ..... They can be displayed using a smart phone screen , tablet screen , printed on paper , ..... There are apps ( local and online ) that create QR codes.
I have learned that TinkerMill.org in Longmont , CO has some interest in developing an access control system. QR codes could be a useful technology.
Using a tablet
I want to explore using QR codes. ( 2 dimensional bar codes )
I am starting an experiment to use a cheeep ( less than $50 ) Android
tablet as a local QR reader. The tablet would read QR codes using a
integral camera ( or USB webcam ). Depending on how the tablet is
networked , it can verify the code, determine permissions , maintain an
activity log , provide a control profile ( permitted length of use ,
permitted dead time , etc. ). In some cases the tablet could provide
some other value to the devices it is connected to. Perhaps the tablet
can also talk to smart phones, tablets, etc.
Ryan Diebel pointed out that Steve Gibson has started a project ( SQRL ) "squirrel" to use QR codes as " a comprehensive, easy-to-use, high security replacement for usernames,
passwords, reminders, one-time-code authenticators . . . and everything else. "
tags: #QRcodes 99guspuppet