: Security software often cannot scan the contents of an encrypted ZIP file. Since many "XF" (X-Force) tools are flagged as "Potentially Unwanted Programs" (PUPs) or malware due to their nature, creators use passwords to keep the files from being deleted immediately upon download.
Passwords on these types of ZIP files are rarely for actual security. Instead, they serve two main purposes:
: Forcing users to return to a specific blog or forum to find a "hidden" password ensures the site gets repeat visits and ad impressions. Security Warning & Best Practices