[EMAIL PROTECTED] wrote: > hello all > > can someone tell me is ATR unique or not ? if unique, is that come from > card (the card itself) or the reader?
- unique to a certent extent. For some of the cards, historical bytes of the ATR can be set. for even some of the some of the cards, the ATR is actually programmed. so one can actually mimic the ATR of another card by returning an ATR which is the same as the other card. - might be able to retrieve the atr of a card by talking to a reader. - usually when the card is inserted to the reader, power and reset signals are pulled high in respective order to tell the card that "hey, i want to know your ATR (Answer to Reset)". The card will response with the ATR within certain time constraints and this data will be interpreted by the reader. This data is crucial for how the reader is going to talk to the card later on. read ISO docs 7816-2 7816-3 to find out more. jipi > > TIA, > nopri > > > _______________________________________________ > Muscle mailing list > [EMAIL PROTECTED] > http://lists.musclecard.com/mailman/listinfo/muscle > > > _______________________________________________ Muscle mailing list [EMAIL PROTECTED] http://lists.musclecard.com/mailman/listinfo/muscle
