Posted by ldldjr (486 days ago)
It depends on the program/s you are using and may also depend on the operating system. For OpenOffice - simply select file, save (or save as), and click the save with password checkbox (if you are using open document format - it doesn't work if you are saving to MSOffice formats). If you are using Linux or Windows with a NTFS file system, and have it set up so each user has their own file areas (you have to sign on using a password), other people should not be able to access your files - unless you gave them the password.
There are numerous utilities on the internet for password protecting individual files and directories. Use google/hotbot/whatever search engine you like, and look for a program that suits your needs and technical expertise.
(I am based in Vietnam)