I recently found myself in a similar position, and found Jekyll ("a blog aware, static site generator") to meet my needs perfectly. Jekyll rejects the implicit assumption of most blogging software: that the solution requires a dynamic platform.
When you approach the problem with that in mind, what you end up with is exactly the three things you are looking for, something that is inherently secure and low-maintenance, with a blogging workflow that is simplicity itself.
vim _posts/YYYY-MM-DD-title-of-post.markdown
git commit -a -m 'new post'
git push
Introductory Post by the Author: http://www.mojombo.com/2008/11/17/blogging-like-a-hacker.htm...