Emailing a draft offer letter or payroll summary? Add a password in Pdf Buddy, then send the password on a different channel (call / WhatsApp). That is everyday protect / unlock hygiene — not DSC cryptography.
Rules of thumb
- Protect when the PDF leaves your PC.
- Unlock only files you own (or have the password for) before merge/compress for a portal that hates restrictions.
- Never upload locked ID PDFs to a random “unlock PDF free” website.