[LinuxUsers] opens source out-of-band authentication projects

[Roger E. Rustad, Jr]

While looking for an iPhone app, I was glad to actually see that RSA has 
an app now strong extended authentication. (I already have something 
like that setup via PayPal and I've seen programs like the following for 
free.)

http://www.phonefactor.com/downloads/

But I was wondering if anyone has seen any open source versions, 
particularly ones that can easily connect to cellular phones via SMS 
messages.

I see Sourceforge projects that do the following individual things, but 
none that offer one complete package (and the ones that kind of do look 
like they're very half baked)

--SMS-to-SMTP gateway
--libraries to build token based out-of-band authentication systems
--certificate authority projects, like CACert (fairly easy to use, 
though documentation isn't easy for those unfamiliar with PKI)
--etc