Frankie wants to validate the integrity of a file by comparing it against an original copy. Which of the following solutions both fulfills this requirement and avoids known security issues?

SHA-256 is the current, secure hashing standard. While it is unlikely that a malicious actor would exploit known flaws in MD5 and SHA-1, in most normal operations SHA-256 remains the preferred option when it is available. The Advanced Encryption Standard (AES) is used for encryption, not hashing.