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Search found 45 matches

by wumindejia
Mon Sep 17, 2018 3:59 am
Forum: Questions & Answers
Topic: I want to know the data format of mifare.
Replies: 2
Views: 38

Re: I want to know the data format of mifare.

You can see this document in the attachment.
by wumindejia
Fri Jun 15, 2018 4:57 am
Forum: Questions & Answers
Topic: how to judge that the class byte of APDU command is valid?
Replies: 4
Views: 197

Re: how to judge that the class byte of APDU command is valid?

According to specific specifications,Ins is generally 0x00,0x04,0x80,0x84.
by wumindejia
Fri Jun 15, 2018 4:27 am
Forum: Questions & Answers
Topic: Applet's own space
Replies: 3
Views: 190

Re: Applet's own space

You can keep new space until SystemException.NO_RESOURCE == ex.getReason()
by wumindejia
Thu Jun 14, 2018 4:29 am
Forum: Questions & Answers
Topic: How to implement multiple different types of applications in a applet
Replies: 1
Views: 168

Re: How to implement multiple different types of applications in a applet

You can new some applet by "new applet" in same package. Or you can use AID to distinguish applacations in a applet.
by wumindejia
Mon Jun 11, 2018 9:35 pm
Forum: Questions & Answers
Topic: difference between javacard and the ordinary card
Replies: 5
Views: 294

Re: difference between javacard and the ordinary card

Card divided into java card and native card. Java card can dynamically download and delete applications, while native card can not.
by wumindejia
Mon Jun 11, 2018 5:51 am
Forum: Questions & Answers
Topic: Mastercard transaction process
Replies: 5
Views: 336

Re: Mastercard transaction process

Alisa1120 wrote:There is another transaction, chip simulation magnetic stripe card transaction.
The first command is select (PPSE and mastercard application);
The next command is GPO;
The next command is read record;
The last command is compute cryptographic checksum.

Thank you!
by wumindejia
Mon Jun 11, 2018 4:36 am
Forum: Questions & Answers
Topic: Mastercard transaction process
Replies: 5
Views: 336

Re: Mastercard transaction process

gorgeous wrote:The first command is select (PPSE and mastercard application instance);
The next command is GPO;
The next command is read record, read record command should have multiple;
The last command is GAC.

Thank you!
by wumindejia
Sat Jun 02, 2018 6:08 am
Forum: Questions & Answers
Topic: WHY P1 is 04 in select command
Replies: 1
Views: 167

Re: WHY P1 is 04 in select command

You can see the command of select in the 7816-4 specification. The meaning of p1 equal to 4 is "select by df name".
by wumindejia
Tue May 29, 2018 9:30 pm
Forum: Questions & Answers
Topic: Mastercard transaction process
Replies: 5
Views: 336

Mastercard transaction process

Hello,everyone. I am a newer at Mastercard. I want to know the process of Mastercard transactions. Who can provide me with documents or scripts or logs of the Mastercard transactions process. Thank you very much!
by wumindejia
Wed May 23, 2018 1:18 am
Forum: Questions & Answers
Topic: How to AUTHENTICATED in Secure channel
Replies: 3
Views: 265

Re: How to AUTHENTICATED in Secure channel

You can refer to appendix D/E/F in the attachment.
JavaCard OS : Disclaimer