[notamerican]

> There is a similar thing in SIM-cards

Got any good resources on this subject? I'd be interested to know more :)

[xaduha]

I'm not entirely sure what he means by that, but SIM-cards are smartcards.

https://en.wikipedia.org/wiki/Subscriber_identity_module#/me...

And you can buy smartcards in this formfactor e.g. https://www.cardomatic.de/epages/64510967.sf/en_GB/?ObjectPa...

[rocqua]

Look into EAP-SIM and EAP-AKA for some concrete examples.

I believe mobile payment also uses the SIM card, but I'm not sure.

For a more general overview see https://en.wikipedia.org/wiki/Universal_integrated_circuit_c....

There is apparently a toolkit to design applications to run on the SIM https://en.wikipedia.org/wiki/USIM_Application_Toolkit

I don't know of any other implementations. An SSH auth module using SIM would be pretty cool.