Yes, the TSA has the legal authority to open any piece of luggage for inspection, and in 2026, they use master keys to do so without damage—but only if you use a TSA-approved lock. These locks are marked with a small red diamond logo (Travel Sentry). If you use a non-approved lock (like a standard padlock or a zip tie), TSA officers are authorized to cut or break the lock to perform a manual search if your bag triggers an X-ray alert. They will not reimburse you for the broken lock. In 2026, even "built-in" suitcase locks are usually TSA-compliant. If they do open your bag, they are required to leave a "Notice of Baggage Inspection" inside. A 2026 tip: some "Smart Luggage" features fingerprint or Bluetooth locks; ensure these also have a physical TSA keyhole, or you run the risk of having your expensive high-tech suitcase's locking mechanism permanently destroyed during a routine security check.