Originally Posted by
gobluetwo
Actually, I believe he said he wasn't sure if there was a boarding pass signature and whether or not his reverse-engineered boarding pass would, um, pass...
Yes . . . I don't know what happened to that thread (moved? deleted?)
But he didn't explore whether there were any kind of security/check features added to the pass that would make changing a 1 to a 3 insufficient to "qualify" for precheck.
Curiously, TSA doesn't seem to have specified one way or the other, and it is reasonable to wonder whether it means that the PreCheck system will be changed or suspended as a result.