jCardSim is a Java Card development platform that allows developers to test and prototype Java Card applications without using actual smart cards. It provides a full emulation of the Java Card environment and supports common cryptographic algorithms. Some key advantages are its cross-platform support, ability to rapidly prototype and test applications, and ease of debugging interactions between apps and the Java Card runtime environment. It is used by companies like Thales and BMW/Audi for JavaCard app development as well as other organizations for prototyping and education.

1. jCardSim
Development platform for Java Card Applications
Ivan Kinash, Mikhail Dudarev
Berlin, 2015

2. Agenda
• Brief history of jCardSim
• Functionality
• Advantages
• Users

3. Brief history of jCardSim
• First public release in December
2011
• jcardsim.org launched in June
2012
• Presented at JavaOne 2012
(Moscow)
• Oracle Duke’s Choice Award 2013
Winner

4. Functionality
• Full Support for Java Card 3.0.4 (Classic) API
• Emulation of Java Card Terminal, ability to use
javax.smartcardio (T0/T1 protocols)
• Ability to run applets remotely
• Connectivity with PC/SC virtual reader
• APDU scripting (scripts are compatible with
apdutool from Java Card Development Kit)

5. Advantages
• Support for most cryptographic algorithms
defined in Java Card Specification
– Message Digests (SHA-1, SHA-224..512)
– Ciphers (DES,AES,RSA)
– Signatures (RSA, ECDSA, DSA, AES_MAC,
DES_MAC, HMAC*)
– KeyAgreements (ECDH*,ECDHC*)

6. Advantages
• Rich Simulation API
– Load/install applets w/o conversion in to cap
– Ability to run multiple card terminals
simultaneously
– Manage card states (Insert/Remove, Reset)
• Cross-platform

7. Advantages
• Rapid Java Card application prototyping
• Ease of writing Unit-tests (5 lines of code)
• Integration with NetBeans
• Allows developer to debug interaction
between Java Card applications and JCRE

8. Simulator API Demo
// 1. Create simulator
CardSimulator simulator = new CardSimulator();
// 2. Install applet
AID appletAID = AIDUtil.create(”a00000006203010c0101");
simulator.installApplet(appletAID, HelloWorldApplet.class);
// 3. Select applet
simulator.selectApplet(appletAID);
// 4. Send APDU
CommandAPDU commandAPDU = new CommandAPDU(0x80, 0x01, 0x00, 0x00);
ResponseAPDU response = simulator.transmitCommand(commandAPDU);
// 5. Check response status word
assertEquals(0x9000, response.getSW()

9. Furtherworks
• Persistence of VM State
• Profiles
– Hardware (RAM/EEPROM, ..)
– Java Card API Set
– Cryptographic algorithms Set

10. Users
• JavaCard applications development
- Thales
- Automobile industry (BMW/Audi)
- Yubico
• As software SE implementation
- Simplytapp (https://www.simplytapp.com)
• Universities

11. THANKS!