In order from most secure to least secure, which is the first parameter for permitting a file?

The most secure parameter for permitting a file is based on the hashing method, which is represented by the option discussing hash. A hash is a fixed-size string of characters generated by a hashing algorithm that uniquely corresponds to the content of a file. Since the hash is derived from the file's actual data, any alteration in the file will result in a completely different hash value. This ensures an exact match, providing a high level of security because it confirms the integrity and authenticity of the file without relying on external factors such as process information or certificates that can change or be varied.

Using a hash means that the file must remain unchanged to be permitted, offering a strong digital fingerprint that is difficult to forge or alter. This level of specificity makes it the most secure option for file permissions. Other methods, while useful, often incorporate other variables that can introduce potential vulnerabilities or reduce the reliability of the file identification process. For instance, relying solely on a combination of path and process or a certificate may not be as foolproof as the unique identifier provided through the hashing process.