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Search found 217 matches

by mabel
Fri Nov 03, 2017 5:55 am
Forum: Shopping FAQ
Topic: Difference between JC10M128C and A22CR card
Replies: 2
Views: 219

Re: Difference between JC10M128C and A22CR card

It's more efficient to check the card product introduction page to know more details by yourself, I think.
by mabel
Wed Oct 18, 2017 10:10 pm
Forum: Questions & Answers
Topic: APDU SELECT communication
Replies: 1
Views: 155

Re: APDU SELECT communication

SELECT command itself for a Java Card is described on the application layer in the corresponding specifications. On the low level only the protocol (T=0/1: ISO7816-3, T=CL: ISO14443) is described . The APDU structure is described in ISO7816-4. The commands described are not supported with the except...
by mabel
Fri Oct 13, 2017 5:49 am
Forum: Questions & Answers
Topic: Doubt about JavaCard Memory
Replies: 3
Views: 214

Re: Doubt about JavaCard Memory

The size of your test array is rather small, so considering all the overhead of executing other bytecodes, the difference is probably going to be difficult to notice.
by mabel
Sun Oct 08, 2017 9:18 pm
Forum: Questions & Answers
Topic: Question about APDU
Replies: 1
Views: 124

Re: Question about APDU

A1: Method sendBytes() causes the card to send a number of bytes to terminal from current APDU buffer.
A2: Method getBuffer() returns a reference to a byte array buffer contained command data sent from terminal to the card.

If you use JCIDE to run your applet, you may communicate with the simulator.
by mabel
Wed Sep 27, 2017 12:16 am
Forum: Algorithm School
Topic: An issue with the verification of ECDSA
Replies: 2
Views: 387

Re: An issue with the verification of ECDSA

If convenient, would you show us your whole project in order to let us confirm where is the problem?
by mabel
Tue Sep 26, 2017 11:55 pm
Forum: Questions & Answers
Topic: Sinus and Cosinus calculation in javacard?
Replies: 5
Views: 298

Re: Sinus and Cosinus calculation in javacard?

Just try to use Look-up table method.

Define an array with size 360 bytes, direct look up the table to calculate sinus and cosinus.
by mabel
Mon Sep 18, 2017 4:09 am
Forum: Questions & Answers
Topic: Get info in paypass credit card
Replies: 4
Views: 218

Re: Get info in paypass credit card

Try to use 00 B2 01 14 00 instead.
by mabel
Fri Sep 08, 2017 5:45 am
Forum: Questions & Answers
Topic: Export encrypted private key
Replies: 2
Views: 189

Re: Export encrypted private key

It is probably a CryptoException where can retrieve the reason code.
by mabel
Thu Sep 07, 2017 1:30 am
Forum: Questions & Answers
Topic: [Pyapdu tool] Can't select applet
Replies: 3
Views: 325

Re: [Pyapdu tool] Can't select applet

It seems that your pyapdutool is not the latest version. You may need to re-download this tool. My pyapdutool(also downloaded from here) is v1.1

pyapdutool-v1.1.png


In my mind, there were some bugs in the old version of pyapdutool.
by mabel
Wed Sep 06, 2017 10:43 pm
Forum: Questions & Answers
Topic: [Pyapdu tool] Can't select applet
Replies: 3
Views: 325

Re: [Pyapdu tool] Can't select applet

1. Would you tell us your card model?

2. Is your pyApdutool version the latest one?

BTW, I have tested your code with pyapdutool on my computer. It can work without any problem.

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