On Thu, 20 Sep 2001 03:02:25
"Shen-Boon Fam" <[EMAIL PROTECTED]> wrote:
> Hi,
> I have question regarding changing smartcard security pins. Currently I'm
> using a towitoko chipdrive to communicate with protected memory cards -
> SLE4428 & SLE4442. The SLE4428 is a 3W protocol card, 1KB memory and has 2
> byte security pins. The SLE4442 is a 2W protocol card, 256 byte memory and
> has 3 byte security pins. When I send a change card pin command to these
> cards, only the SLE4442 works correctly. The SLE4428 doesn't work & now I
> don't even know what the new changed pins is. The hex command I send is as
> below:
> SLE4428 "0x00,0x24,0x00,0x00,0x04,2 byte old pins,2 byte new pins"
> SLE4442 "0x00,0x24,0x00,0x00,0x06,3 byte old pins,3 byte new pins"
> Is the change pin command of SLE4428 different from SLE4442?
> Any way to crack what is the smartcard's security pins or reset them?
> Thanks!
>
> Regards,
> Shen Boon
I am using a SLE4428 card and i never got a problem.
What do you mean by it does not work What are the SW1 and SW2 number such as
0x90 0x00 or others ?
If you use the tester provided by towitoko are you able to change your card Pin
for the SLE4428 ?
Maybe your card is simply blocked that means you can't verify the pin anymore because
you have failed 8 times to input the correct pin.
Concerning your question you can use the SLE4442 code with the SLE4428 by providing
0xff
as the 3rd bytes.
Hope this will help.
--
Christian Jean
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