What are the techniques to secure word processing document?

Word documents with citizen data or exam drafts must be protected from reading, editing and loss.

Techniques:

1. Password protection — File → Info → Protect Document → Encrypt with Password. Blocks opening without password.
2. Restrict editing — Allow only comments or tracked changes; lock sections with exception users.
3. Read-only / Mark as Final — Prevents accidental edits before distribution.
4. Digital signature — Proves author and detects tampering (valid under ETA 2063 for official docs).
5. Backup and versioning — AutoRecover + OneDrive version history; keep offline copy.
6. Macro and sharing caution — Disable unknown macros; share via restricted links, not open forwarding.

Best practice: strong password + restricted editing + backup — three layers for office letters.