Our Online Store have the new products: RFID antenna board. Currently it can work with JC10M24R and JCOP4 card chips.
Compared with normal cards, the antenna board module has a smaller size and fixed holes, which is easy to integrate in the IOT(Internet Of Things) project.

Search found 8 matches

by Anenl
Thu Feb 22, 2018 11:23 am
Forum: Algorithm School
Topic: The same demo of encryption and decryption data
Replies: 1
Views: 19161

The same demo of encryption and decryption data

I am going to encrypt and decrypt the data in my project. Could anybody provide algorithm sample code? Or where I can find sample code about algorithm, such as DES and RSA .
by Anenl
Thu Oct 19, 2017 10:21 pm
Forum: Questions & Answers
Topic: Change ATR value
Replies: 4
Views: 10979

Re: Change ATR value

Thank you for all the help. It's indeed a useful online tool for me.

https://javacardos.com/tools/atr.html
by Anenl
Wed Oct 18, 2017 10:25 pm
Forum: Questions & Answers
Topic: Change ATR value
Replies: 4
Views: 10979

Change ATR value

I am trying to change my card ATR value to 3B 6D 00 00 00 73 C8 00 13 64 54 34 42 33 00 90 00
I have got the script already. But before doing that I would like to know how you know which part is ATR value and which part is historical bytes?
by Anenl
Fri Sep 15, 2017 2:40 am
Forum: Questions & Answers
Topic: command usage of GET-DATA and STORE-DATA
Replies: 1
Views: 6226

command usage of GET-DATA and STORE-DATA

I can store 8 bytes of data using store-data. But when I try to retrieve the data, I got the standard data, Is this the expected behavior of the java card? Hope anyone can give me some clues to help me out. cm> store-data 9F66081122334455667788 > 80 E2 80 00 0B 9F 66 08 11 22 33 44 55 66 77 88 < 90 ...
by Anenl
Mon Sep 04, 2017 3:53 am
Forum: Questions & Answers
Topic: How to know Le in APDU command ?
Replies: 1
Views: 5760

How to know Le in APDU command ?

We can use apdu.setIncomeandReceive to get the byte number we received, and compared with Lc to make sure if the APDU command is incorrect or correct.If I send Le in my APDU, it must be one byte of Data field. And I found there is not a ISO7816,OFFSET_LE, so how can the card get the Le? In java card...
by Anenl
Wed Aug 09, 2017 11:09 pm
Forum: Questions & Answers
Topic: How to handle short commands
Replies: 2
Views: 6747

Re: How to handle short commands

As shown in the following code, When I sent 0x00, it works, but with other, I got error status word. m> /send 00 => 00 <= 00 00 00 00 00 90 00 cm> /send 01 => 01 <= 68 81 cm> /send A0 => A0 <= 6D 00
by Anenl
Wed Aug 09, 2017 2:13 am
Forum: Questions & Answers
Topic: How to handle short commands
Replies: 2
Views: 6747

How to handle short commands

For the project requirement, I am developing an applet to anwser to some specific commands. But some of these commands are only 2 byte length, which don't match with APDU standard length - 4 byte. And the response I get from the applet is only 0x6881. So I wonder if there is a way to do handle short...
by Anenl
Mon Jul 31, 2017 3:31 am
Forum: Applets Development Guide
Topic: Help to give me some example APDU for me to write data to java card
Replies: 1
Views: 6810

Help to give me some example APDU for me to write data to java card

As the subject said, please help to give me some example APDUs for writing data to java card.
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