Originally Posted by
paperwastage
I know they were testing new scanners which do connect real-time (see the travel safety forum)
One thread talking about rfqs for such scanners, let me see if I can find the other one
https://www.flyertalk.com/forum/28424706-post15.html
Just don't know if he (or OP) would have encountered one
Someone can be a guinea pig at different airports - get an old boarding pass, perform sdc, and go thru with the old boarding pass
While it isn't your job to verify this - I'm skeptical even with a test system, TSA will verify the validity of boarding pass beyond credentials as in you are who you say you are and does the boarding pass have a valid digital signature.