MT Protect 1.0b1
When I first wrote my password protection hack, I noticed two major flaws with it:
1) You had to keep re-applying the hack every time you upgraded MT (this is the case with all hacks but I found this to be a major pain)
2) The actual protection method was rather basic. The password would need to be distributed and could be leaked.
As a result, I've written a new plugin called MT Protect, a plugin that allows you to protect entries either with the use of passwords or by verifying the reader's identity through Typekey. I've currently labelled it as beta as the featureset isn't complete and I haven't thoroughly tested it. None-the-less, it should be good enough to install and use. If you do come across any bugs, please file them.
Planned improvements include Typekey groups for example Friends, Work etc. and protection of entire blogs.