TSA lock(Transportation Security Administration lock) A luggage lock that can be opened not only by its owner but also by TSA agents at U.S. airports. By law, agents are allowed to inspect the contents of all checked baggage. If a suitcase secured with an ordinary lock is targeted for examination, the TSA will cut open and destroy the lock. However, agents are able to open a TSA-approved lock with a master key.
Unfortunately, TSA locks are not entirely tamper proof. A line of Travel Sentry locks was approved by the TSA, but the master keys were later found to be reproducible on a 3D printer. See smart luggage.