Yes, you have to go through the site. You create an user, which is real quick, (any username and password you want) and once logged in, in your dashboard, find the "Resteem" buttom. In there you paste your own article's Steemit URL. And @echowizard will resteem it.
For example, this would be a perfectly valid URL: https://steemit.com/books/@artgirl/angels-and-demons-before-the-da-vinci-code-book-controversy (yup, your article).
Site needs something called WIZ Points (25) to resteem, but you can get them for free right there rather fast.
You will never have to use any of your Steemit passwords there, so it is perfectly safe to use.
oh i see... ok maybe i will check on it.