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 17 matches

by AmigoJack
Fri Sep 29, 2017 3:38 am
Forum: Questions & Answers
Topic: What' wrong with my applet
Replies: 3
Views: 7656

Re: What' wrong with my applet

Thelogan wrote:It's memory problem.
JCOP supports object deletion . Please check JC 2.2.1 API doc, JCSystem.isObjectDeletionSupported() and requestObjectDeletion().


Thank you for your help. But where should I call requestObjectDeletion() ? And should I try to initialize all variables in constructor?
by AmigoJack
Thu Sep 28, 2017 10:45 pm
Forum: Questions & Answers
Topic: What' wrong with my applet
Replies: 3
Views: 7656

What' wrong with my applet

I am experiencing a strange problem. I am using a JCOP J3D081 card to encrypt/decrypt messages and to store user information data. Everything works fine, but after some time the card does not give me the info, e.g. the stored exponent back. I guess there must be something wrong with the my javacard ...
by AmigoJack
Fri May 19, 2017 2:24 am
Forum: Questions & Answers
Topic: Problem about BitcoinWallet
Replies: 2
Views: 6316

Re: Problem about BitcoinWallet

It works! It works! Thank you very much, UNKNwYSHSA.
by AmigoJack
Thu May 18, 2017 11:15 pm
Forum: Questions & Answers
Topic: Problem about BitcoinWallet
Replies: 2
Views: 6316

Problem about BitcoinWallet

I downloaded BitcoinWallet from this topic . When I debug this applet in JCIDE, it returns error below: Does anybody know how to solve this problem? Thanks. com.ledger.wallet [May 18,2017 15:03:31] "C:\JavaCardKit\JDK\bin\javac" -g -deprecation -target 1.2 -source 1.2 -J-Duser.language=en ...
by AmigoJack
Wed May 03, 2017 11:23 pm
Forum: Questions & Answers
Topic: Time duration on RSA Encryption
Replies: 2
Views: 5539

Re: Time duration on RSA Encryption

Thank you UNKNwYSHSA. It helps.

In fact, my goal is to find difference of duration on card for different length of key. So that I can evaluate the RSA performance on real card. Do you have any conclusion or experience on this?
by AmigoJack
Tue May 02, 2017 3:43 am
Forum: Questions & Answers
Topic: Time duration on RSA Encryption
Replies: 2
Views: 5539

Time duration on RSA Encryption

I am testing RSA Encryption with keys length 768 and 1024. In debugging window, about 4000 us for 768 key length, about 3000 us for 1024 key length. For other keys, the time duration increases from 512 to 1984. Does anyone have any idea about time duration? private final static short RSA_KEY_SIZ = K...
by AmigoJack
Thu Oct 27, 2016 3:21 am
Forum: Card Products
Topic: Sample code to change ATR history bytes
Replies: 1
Views: 7138

Re: Sample code to change ATR history bytes

Thank you for sharing!
by AmigoJack
Fri May 20, 2016 1:36 am
Forum: Questions & Answers
Topic: the difference between an applet and an executable load file
Replies: 2
Views: 6474

Re: the difference between an applet and an executable load file

Package or Library == Executable Load File, Applet == Module,
by AmigoJack
Tue Feb 23, 2016 6:05 am
Forum: Card Products
Topic: How is the security domain developed?
Replies: 1
Views: 6132

How is the security domain developed?

Dear all,

Does anyone know how the security domains are developed? Is it developed in JavaCard language? or Native? Thanks in advance.

BR
AmigoJack
by AmigoJack
Thu Jan 14, 2016 11:10 pm
Forum: Questions & Answers
Topic: How to read citizen information from the card
Replies: 1
Views: 5552

Re: How to read citizen information from the card

I think that the first thing you should do is to parse ATR. You can get some information from the parsing result.
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