This is where the comes in. Think of it as a digital fingerprint—a unique string of characters that represents the exact state of a file's data. What is a File Checksum?
You get a string like e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 . file checksum
Part of the SHA-2 family, this is currently the industry standard. It is incredibly secure and virtually impossible to "fake." This is where the comes in