archinal

This year I'm going to try to keep a journal sporadically. It will at its basic form be text based content similar to a blog, but more personal.

I'd like to use a program that will at the very least encrypt, decrypt and collate my journal entries given some password. I'd like it to be self contained such that I can effectively hold everything I need on a USB key (I'd rather not depend on internet connectivity and "the cloud").

Bonus points for things that can search by tags, are OS agnostic and support multiple kinds of media (text files, images etc).

Does anyone know of any existing programs? Do you use any yourselves?