What is the difference between a Known Traveler Number and a Redress Number when it comes to air travel security measures?

A Known Traveler Number (KTN) is a pre-approved identification number that allows travelers to access expedited security screening at airports. A Redress Number, on the other hand, is a unique identifier given to individuals who have faced difficulties or delays during security screenings in the past. While a KTN helps speed up the security process, a Redress Number is meant to address previous issues and prevent future delays.