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 12 matches

by sakkiotto
Sun Aug 27, 2017 10:52 pm
Forum: Questions & Answers
Topic: A modified CAP file can be installed w/o any problem?
Replies: 2
Views: 6829

Re: A modified CAP file can be installed w/o any problem?

mabel wrote:What CAP component did you modify?


I just change one byte at will. And I am not clear that which component I modified? How can I confirm that?
by sakkiotto
Thu Aug 24, 2017 10:46 pm
Forum: Questions & Answers
Topic: A modified CAP file can be installed w/o any problem?
Replies: 2
Views: 6829

A modified CAP file can be installed w/o any problem?

Recently, I am working on java card security study. The first test I would like to do is trying to load a modified CAP file into java card. I modify one byte of the CAP file at will via WinHex. What make me strange is that my modified CAP file can still be uploaded and installed with its standard me...
by sakkiotto
Wed Jan 18, 2017 11:58 pm
Forum: Algorithm School
Topic: 3DES Key
Replies: 2
Views: 7601

3DES Key

I have to encrypt data with 3DES algo in my applet. I also need to decrypt the data in my host application. And the key for 3DES should be 24 bytes, anyone can figure out how to extend the 16 byte key to 24 byte key? Here is my code cipherDES = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M1, false...
by sakkiotto
Thu Oct 27, 2016 11:22 pm
Forum: Algorithm School
Topic: CAN'T calculate C-MAC
Replies: 2
Views: 7438

CAN'T calculate C-MAC

I am trying to implement SCP02 i=15, I can calculate the C-MAC with DES for the external authenticate command without any problem, but I can not calculate the C-MAC for the second command with the same algorithm. Anyone know where the problem exists?
by sakkiotto
Mon Mar 21, 2016 2:00 am
Forum: Questions & Answers
Topic: mechanism of secure channel initiation on mode implicit
Replies: 1
Views: 5379

Re: mechanism of secure channel initiation on mode explicit

The steps are much the same as the explicit, except that there is no INIT-UPDATE/EXT-AUTH commands to deal with. When the first secured APDU is received (CLA = 0x84), follow the process to generate session keys and verify the MAC. The card spec outlines how to generate a MAC with the session keys.
by sakkiotto
Sat Jan 23, 2016 3:42 am
Forum: Questions & Answers
Topic: How to add a JavaCard3.0 to a mobile phone
Replies: 2
Views: 6261

How to add a JavaCard3.0 to a mobile phone

I still have a question. I wonder how to add a JavaCard3.0 to a mobile phone.

Is it possible to buy a java card (JC3.0) that uses the microSD card reader on phone?
by sakkiotto
Sat Jan 23, 2016 3:38 am
Forum: Questions & Answers
Topic: Strong authentication and JavaME apps
Replies: 1
Views: 5410

Strong authentication and JavaME apps

Will it be possible to write a JavaME application which can send http request to JavaCard 3.0 and using JavaCard for strong authentication?
I suppose I also have to write a web application and deploy on the JavaCard. Any tips?
by sakkiotto
Sun Dec 20, 2015 11:55 pm
Forum: Algorithm School
Topic: Is it possible to use ALG_HMAC_SHA1 in JC2.2.1?
Replies: 4
Views: 9855

Re: Is it possible to use ALG_HMAC_SHA1 in JC2.2.1?

You could just use the value that you find in the JC2.2.2 version for the constant ALG_HMAC_SHA1 (= (byte)24) and pass it to the Signature.getInstance() method. So using the value is not a problem. However, the smartcard must support this algorithm in order for you to be able to use. @horse dream ,...
by sakkiotto
Fri Dec 18, 2015 11:28 pm
Forum: Questions & Answers
Topic: How can I get exact memory value if it's over 32767 bytes?
Replies: 1
Views: 5450

How can I get exact memory value if it's over 32767 bytes?

I know I can call JCSystem.getAvailableMemory(MEMORY_TYPE_PERSISTENT) to get the remaining persistent memory of my card. But if the card's memory is over 32767 bytes, how can I get the exact value?
by sakkiotto
Tue Dec 15, 2015 4:44 am
Forum: Algorithm School
Topic: Is it possible to use ALG_HMAC_SHA1 in JC2.2.1?
Replies: 4
Views: 9855

Is it possible to use ALG_HMAC_SHA1 in JC2.2.1?

My javacard version is JC2.2.1 for which signature class doesn't include ALG_HMAC_SHA1 method. To my best knowledge, it includes this method after JC2.2.2. So is it possible to use this method without upgrading my card JC version?
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