The most secure locks are those that are resistant to tampering and bypassing, and that use advanced technologies to prevent unauthorized access. Some examples of secure locks include:

Deadbolt locks: Deadbolt locks are considered to be very secure because they use a bolt that is locked into place with a key or a thumb turn. Getting a deadbolt lock installation is difficult to pick or bypass, making it a good option for exterior doors.

Smart locks: A smart lock installation is considered to be one of the most secure because it can be controlled and accessed remotely using a smartphone app or other device. Smart locks can also use advanced technologies such as biometric authentication, which makes them difficult to bypass.

High-security locks: High-security locks are designed to be resistant to tampering and bypassing. They often use special keys that are difficult to replicate and may have additional security features such as pick-resistant cylinders or anti-drill plates.

It’s important to note that no lock is completely foolproof, and the level of security provided by a lock will depend on a variety of factors, including the quality of the lock and the skill and determination of any potential intruders.