concealment writes in with a story about a newly found security issue with the bar codes on boarding passes. "Flight enthusiasts, however, recently discovered that the bar codes printed on all boarding passes — which travelers can obtain up to 24 hours before arriving at the airport — contain information on which security screening a passenger is set to receive. Details about the vulnerability spread after John Butler, an aviation blogger, drew attention to it in a post late last week. Butler said he had discovered that information stored within the bar codes of boarding passes is unencrypted, and so can be read in advance by technically minded travelers. Simply by using a smartphone or similar device to check the bar code, travelers could determine whether they would pass through full security screening, or the expedited process."