How do I use an rsa securId like device to secure a Joomla website?

I've got a joomla website (Community Builder w开发者_C百科ith CBSubs) purchased through joomlapolis. The client wants to secure authentication with an rsa device. If someone could point me in the right direction, that'd be great.

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The RSA SecureID devices are expensive. -- Not the token carried around but the server-side piece. Here's a wikipedia article on alternatives: http://en.wikipedia.org/wiki/Security_token

In all these cases, you'll need to install the server side software and integrate it yourself into Joomla authentication.