Page 1 of 1

check the failed authentication counter

Posted: Tue Jun 28, 2016 3:14 am
by warex
I got some java cards. However, I know nothing about these cards but the card model. Is there any method to check the failed authentication counter? And how can I know if the cards are already blocked due to too much failed tries?

Re: check the failed authentication counter

Posted: Tue Jun 28, 2016 8:18 am
by chico0609
To check if your card is locked, you can send GET STATUS command, it will return Life Cycle State. If the card is locked, it will be in the CARD_LOCKED state

Re: check the failed authentication counter

Posted: Tue Jun 28, 2016 11:46 pm
by UNKNwYSHSA
I only know the Sequence Counter of SCP and retry counter of PIN verify.