Secret Secure Flight “vetting” algorithm now in use by 4 US airlines
A TSA press release announces the “implementation” of the Secure Flight system for pre-departure “vetting” of airline passengers (i.e. deciding, according to a secret algorithm, whether to allow them to fly):
To date TSA has assumed the watch list matching responsibility for passengers on domestic commercial flights with four volunteer aircraft operators and will add more carriers in the coming months.
As quoted above, the TSA describes the process for making permission-to-travel decisions and assigning risk scores (“cleared”, “inhibited”, or “not cleared”, corresponding to the scores of “green”, “yellow”, and “red” in the previous CAPPS-II version of the proposal which eventually morphed into Secure Flight) as “watch list matching”. But the process diagram (included as slide 8 of this presentation to potential Secure Flight contractors) makes clear that the scheme is considerably more complex than simple list matching, with many more inputs and feedback loops.
Procedures and directives for implementation of Secure Flight are contained in secret “Security Directives” issued by the TSA to airlines, secret internal TSA documents including software code, and secret “Aircraft Operator Implementation Plans” submitted by airlines and approved by the TSA. None of these have been made public. As a result, it is impossible for travelers or the public to know what we are required to do, under what conditions the TSA will or will not give us permission to fly, and whether any claims about “requirements” made by airlines are true or false.