Can I password protect my blog?
Yes. You can password protect your blog so only those who know the password can read it. The way you set this up will vary according to which blog publisher you are using.
Blogger – http://www.blogger.com/
You can also choose whether you want your blog listing to appear in blogger.com:
TypePad – http://www.typepad.com/
If you do not use Blogger or TypePad the answer can most likely be found in the help section of your blog publisher’s website.