Smart Card SIMS

We covered smart card SIMS briefly in Chapter 4. These are the de facto standard for
providing both over-the-air encryption and end-to-end encryption. Hitachi, for example,
has a 32-bit microcontroller embedded on a smart card with an onboard cryptographic
coprocessor that can do a 1024-bit RSA calculation in less than 120 ms (courtesy
of the hardware coprocessor speeding up the calculation). Having the processor hardware
on the smart card makes the solution more resilient to hardware attack.