KrebsOnSecurity offers several reminders of how being careless with your boarding pass could jeopardize your privacy. An October 2015 article about the potential dangers of tossing out or posting online your airline boarding pass remains one of the most-read stories on this site. Security researcher Michal paek gave a talk at a conference in the Czech Republic in which he explained how a few details gleaned from a friends boarding pass posted online give him the ability to view passport information on his friend via the airline’s Web site. Some boarding pass barcodes conceal even more personal information than what’s printed on the boarding pass.”]