Yes, storage containers can be securely locked using a variety of high-security methods. Heavy-duty padlocks are the most common, but many construction sites opt for more advanced security measures such as lockboxes, which cover and protect the lock from tampering. Reinforced locking mechanisms, such as bar locks or internal deadbolts, add an extra layer of security. Some containers also come equipped with built-in security features like tamper-proof latches. Combining these with additional site security measures, like surveillance cameras or lighting, further deters unauthorized access.