Excited to tell you that our welfare activity has been upgraded - Paying only $5.00 + Freight to get JCOP J3H145 card and A40CR card.
Please check this post for more details.

Moreover, if you want to get Free Samples by Paying Freight only , please check this page.

Search found 18 matches

by afrascoi
Thu Oct 12, 2017 10:27 pm
Forum: Questions & Answers
Topic: Doubt about JavaCard Memory
Replies: 3
Views: 526

Doubt about JavaCard Memory

I made a simple applet to test the speed of adding arrays, depending whether they are saved in EEPROM or RAM. Since working with variables stored in RAM should be faster, I was really surprised when I noticed no difference between them. I would really like to know where I went wrong, but simply cann...
by afrascoi
Tue Jun 20, 2017 6:10 am
Forum: Shopping FAQ
Topic: JC10M128C card
Replies: 2
Views: 668

Re: JC10M128C card

Thanks for your prompt reply. I will get some samples first.
by afrascoi
Tue Jun 20, 2017 2:07 am
Forum: Shopping FAQ
Topic: JC10M128C card
Replies: 2
Views: 668

JC10M128C card

Dear JavaCardOS Team, I am interested in JC10M128C card. The features of this card meet my need well. But I don't need it to be finished sim-format. I need it unibody, just like other common contact card. So do you provide the JC10M128C card that have not been cut to SIM size? Thanks for your reply....
by afrascoi
Fri Apr 28, 2017 5:59 am
Forum: Questions & Answers
Topic: pre-personalization on a J2A040 card
Replies: 2
Views: 591

Re: pre-personalization on a J2A040 card

Wow, I used transport key as the AID in the SELECT command. it works. :D Many thanks for your help.
by afrascoi
Thu Apr 27, 2017 11:16 pm
Forum: Questions & Answers
Topic: pre-personalization on a J2A040 card
Replies: 2
Views: 591

pre-personalization on a J2A040 card

I want to do pre-personalization on a J2A040 card. And I know pre-personalization procedure. But when I send the SELECT command to select the ROOT applet, the card returns ERROR status word 0x6A81, has anyone encountered this problem when doing pre-personalization on JCOP card? Please guide how to r...
by afrascoi
Tue Dec 27, 2016 5:27 am
Forum: Questions & Answers
Topic: Checksum result is different between host and card
Replies: 4
Views: 759

Re: Checksum result is different between host and card

I just found that Java CRC32 starts with an initial value 0xFFFFFFFF. So I set the card to 0xFFFFFFFF, it works. Now both the card and host checksum result is same. byte[] ini = new byte[]{(byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF}; checksum.init(ini, (short)0, (short)ini.length); The problem w...
by afrascoi
Tue Dec 27, 2016 4:42 am
Forum: Questions & Answers
Topic: Checksum result is different between host and card
Replies: 4
Views: 759

Re: Checksum result is different between host and card

My host code to creates a checksum Checksum checksum = new CRC32(); checksum.update(rawData, 0, rawData.length); long checksum_value = checksum.getValue(); Create checksum on card Checksum checksum = Checksum.getInstance(Checksum.ALG_ISO3309_CRC32, false); checksum.doFinal(data, (short)0, (short)dat...
by afrascoi
Mon Dec 26, 2016 11:42 pm
Forum: Questions & Answers
Topic: Checksum result is different between host and card
Replies: 4
Views: 759

Checksum result is different between host and card

I tried to send a message with a CRC32 code from the java host to the java card. The host creates a checksum and send it with the message to the card and I also created a checksum on the card side. But I got the different results from two sides.
Why?
by afrascoi
Fri Nov 11, 2016 5:21 am
Forum: Questions & Answers
Topic: bArray in JCRE
Replies: 3
Views: 629

Re: bArray in JCRE

The size depends on the card. And you can't store them in a reference due to the JCRE applet firewall.
by afrascoi
Wed Oct 12, 2016 5:01 am
Forum: Algorithm School
Topic: Parameters : byte [] buffer and offset
Replies: 1
Views: 663

Parameters : byte [] buffer and offset

Could anybody help me understand the arguments to the functions getModulus(byte [] buffer, short offset) and getExponent(byte [] buffer, short offset) well. What is byte [] buffer and offset?
JavaCard OS : Disclaimer