Boarding passes often have confusing details on them from the flight numbers to the QR codes.
Recently it was revealed the documents hold very personal information in code-form, which if posted online, could pose a security threat to the passenger in question.
It has recently emerged one of the codes within the boarding pass could hide a secret meaning.
Have you ever see the SSSS code? Here’s what it means.
Boarding passes can hide this secret code that passengers are unaware of
It can then mean stricter security checks for the unlucky passenger when going through
According to hack website Life Hacker, the code stands for “Secondary Security Screening Selection”.
It means that the person has been selected to go through additional checks, be it at the check-in desk or later to double check the traveller’s ID.
Whilst the code can be random, it can be for various reasons.
Despite there being no confirmed reason why, the website implies that certain suspicious trips such as, “last-minute flights, international one-way fares, paying for a flight in cash, and travel that originates in a ‘high-risk country.’” could be the reason.
Boarding passes with SSSS can cause the passenger to go through longer security lines
It can then mean stricter security checks for the unlucky passenger when going through, such as a more thorough pat down, a check of all electronics as well as the full body scan.
It then leads to a stamp on the boarding pass to confirm this, which will then be double checked at the boarding gate.
This can also take much longer than usual, so passengers should definitely allow more time at the airport.
If the SSSS code is printed on a boarding pass, passengers may also find themselves unable to print it out before their journey – meaning it can only be printed at the airport check-in desk.
Boarding passes with the secret code can cause problems for fliers
However, boarding passes could be scrapped altogether one day as airlines trial biometric technology.
US airline JetBlue has been trialling facial recognition at airports as a quicker and more secure way to travel.
Travellers will head to a camera station when checking in where their photograph will be taken.
This is then to be compared against a database of passport and visa images to confirm the identity, preventing the need for long and laborious queues.