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Search found 15 matches

by GraceGIRL
Mon Jan 23, 2017 3:56 am
Forum: Card Products
Topic: DESFire card and JavaCard
Replies: 1
Views: 1031

DESFire card and JavaCard

When we use smatcard in our project, which one we should select? For DESFire card: Need one reader to support it; Write the client application for it; (But the command are not popular known by developers) The price of DESFire card is about $2.5 per piece. For JavaCard: Here are more reader can suppo...
by GraceGIRL
Wed Mar 23, 2016 9:01 am
Forum: Questions & Answers
Topic: a little confused about "Default selected"
Replies: 4
Views: 938

Re: a little confused about "Default selected"

I also think that after I installed the applet with the default selected application privilege, I can send command even if the applet is not selected.

But it seems that we are wrong.
by GraceGIRL
Tue Mar 08, 2016 6:18 am
Forum: Algorithm School
Topic: two methods in class Cipher(): update() and doFinal()
Replies: 2
Views: 1073

two methods in class Cipher(): update() and doFinal()

I know that there are two methods in class Cipher(): update() and doFinal().
But what is the update() doing? What about doFinal()? Would anybody give me a brief and simple explanation?
by GraceGIRL
Wed Feb 24, 2016 5:36 am
Forum: Algorithm School
Topic: How to store private Key into applet
Replies: 1
Views: 921

How to store private Key into applet

Hi all! It's me again. Recently, I am working on a project where RSA key pair will be generated at server and Private key needs to be stored in applet which can be used for further crypto operation. But I don't know how to store required private key data to the applet. Would anybody give me some poi...
by GraceGIRL
Tue Dec 08, 2015 1:30 am
Forum: Card Products
Topic: What are secure channel keys in java card used to do?
Replies: 1
Views: 1044

What are secure channel keys in java card used to do?

As I found by google, ENC stands for Encryption, MAC stands for Message Authentication Code and DEK stands for Data Encryption Key.
I want to know when these three secure channel keys are used. What are they used to do? Are all these keys used in every communication step?
by GraceGIRL
Tue Dec 01, 2015 6:30 am
Forum: Card Products
Topic: How to change the card Historical Bytes?
Replies: 5
Views: 1973

How to change the card Historical Bytes?

I know that changing Historical bytes is limited to Pre-Personalization step. But I found a method named setATRHistBytes in the GlobalPlatform APIs today. This is description. setATRHistBytes public static boolean setATRHistBytes (byte[] buffer, short bOffset, byte bLength) This method sets the hist...
by GraceGIRL
Fri Nov 27, 2015 5:02 am
Forum: Questions & Answers
Topic: Store data in EEPROM or RAM?
Replies: 5
Views: 3316

Store data in EEPROM or RAM?

When I develop a java card applet, what data should I store in the EEPROM? What data should I store in the RAM?
What's difference between them?
by GraceGIRL
Wed Nov 25, 2015 7:59 am
Forum: Questions & Answers
Topic: Could the CAP file be uploaded and installed into card successfully?
Replies: 1
Views: 606

Could the CAP file be uploaded and installed into card successfully?

If my applet uses an API that COS doesn't support, could the CAP file of my applet be uploaded and installed into the card successfully?
by GraceGIRL
Mon Nov 23, 2015 7:47 am
Forum: Card Products
Topic: Is there any way to get JC version of Java Card.
Replies: 2
Views: 924

Is there any way to get JC version of Java Card.

As the subject said, how can I get java card version from a java card?
by GraceGIRL
Fri Nov 20, 2015 8:02 am
Forum: Questions & Answers
Topic: How to generate a 2.1.1 Compliant CAP file with my 2.2.2 JCKit
Replies: 1
Views: 546

How to generate a 2.1.1 Compliant CAP file with my 2.2.2 JCKit

I have just finished a java card applet and want to upload it to a java card. But the java card supports Java card 2.1.1 standard. So I am searching a method to generate a 2.1.1 Compliant CAP file with my 2.2.2 JCKit. Could somebody give me any pointers ?
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