Since attackers may embed malicious code into image files, enforcing content scanning of all inbound image files can help prevent the execution of the hidden code, reducing the risk of compromise. The use of digital signatures alone does not prevent malicious code execution in image files because a signed image can still contain malicious code. Limiting file sharing to trusted devices is a good security practice but does not necessarily protect against image-based attacks coming from a compromised but trusted device. Enabling macros in image files is not directly relevant, as macros are typically associated with documents rather than images.