On Fri, Dec 22, 2000 at 02:46:25PM -0500, David Corcoran wrote:
[Jordan Dimov <[EMAIL PROTECTED]>]
> Is there a way to access the card RNG from the terminal (i.e. not from
> within an applet) ?
Schlumberger's Cyberflex Access cards documents a command that will provide you
with a bunch of random bits. I tried it a few months back and it provides
something that looks like noise, but I haven't properly tested it with eg.
ent, from <URL:http://www.fourmilab.ch/random/>).
> In general, how are RNGs implemented on smartcards?
That depends on the implementation (doh!). Pick one from
<URL:http://webnz.com/robert/hwrng.htm>, although I doubt you can expect them
to put a geiger-counter onchip ;). I'd guess it is based on electrical noise,
possibly augmented with noise obtained from various subsystems in the chip.
Regarding Cyberflex you have to ask Siemens about their SLE160 (or was it 320?)
chip.
--
Per Harald Myrvang "Researcher" Computer Security And Bacon!!
perm+(pasta-cs-uit-no|acm-org) s/+/@/ s/-/./ Office: (+47)7764 4055
***************************************************************
Linux Smart Card Developers - M.U.S.C.L.E.
(Movement for the Use of Smart Cards in a Linux Environment)
http://www.linuxnet.com/smartcard/index.html
***************************************************************
