Which method allows a client application to launch without checking the hash value?

The method that allows a client application to launch without checking the hash value is the Publisher method. This approach relies on the digital signature of an application rather than its hash. By verifying the publisher's certificate, this method ensures that an application comes from a trusted source without needing to evaluate its hash, which is a more stringent and potentially limiting check.

The Publisher method is particularly advantageous for organizations that regularly update applications; as long as the publisher’s certificate remains valid and trusted, users can run the applications without interruption or additional checks. This also simplifies management since updates to the application do not require new hashes to be calculated and approved.

In contrast, the other methods—Hash, Path, and Zone—each have tighter controls or different mechanisms. The Hash method requires checking the exact hash of the executable, making it very secure but less flexible for updates. The Path method focuses on the location of the application and allows or denies execution based on the path, which can introduce complexity if multiple applications occupy the same directory. The Zone method is used for determining the trust level based on the origin of the file, which also does not provide the same level of trust verification as the Publisher method.