Which of the following should a technician perform to verify the integrity of a file transferred from one device to another?

Authentication is the process of verifying the identity of a user or device. While it ensures that the entities involved in a file transfer are legitimate, it does not provide a mechanism to check whether the content of the file itself has been altered during the transfer process.

Obfuscation refers to making something difficult to understand or interpret, often used to protect code or data from being easily read or accessed. However, it does not verify integrity; instead, it aims to hide the content. Therefore, while obfuscation can protect data from unauthorized access, it does not confirm whether the data has been altered.

Encryption secures data by converting it into a format that can only be read by those with the appropriate decryption key. While it protects the confidentiality of the file during transfer, it does not provide any information regarding whether the file has been changed or corrupted.