Smart card technology is widely used in various security and identity authentication applications today.
Using the Mini Calculator as an example application and some basic knowledge, we will explore Java Smart Card technology in this post.
The purpose of providing a simple example that illustrates communication between a Java Smart Card and a host application is to aid novices in understanding smart card technology.
Java Smart Card Mini Calculator (Online Free Tool)
Result:
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In order to understand this tutorial you must know J2SE and have should have basic understanding of (Java) Smart Cards. To get to what java card is please visit the Oracle official site here.
Moreover you might need to have the basics understanding of following standards:
- Global Platform 2.1/2.2
- ISO 7816-3
- ISO 7816-4
What is a Smart Card Applet?
A Smart Card Applet refers to an application that runs on a smart card. These applets are developed on a computer and then installed on the smart card.
What are Host Applications?
Host applications run on a computer and interact with the smart card using APDUs (Application Programming Data Units).
What is an APDU?
APDU stands for Application Programming Data Unit and serves as the communication medium between the applet and the host application. There are two types of APDUs: command APDU (sent from the host application to the applet) and response APDU (sent by the applet in response to the command APDU).
Structure of an APDU
An APDU consists of six fields: CLA, INS, P1, P2, LC, Data, and LE. These fields specify the operation the host application wishes to perform and how the applet should process the data.
Application Description
The example application focuses on a simple smart card calculator. The user inputs two numbers, and then they can choose between addition, subtraction, multiplication, or division. The selected operation is used to construct the appropriate APDU sent to the applet, which responds with the calculated result to the host application.
JavaScript for User Interface
Please note that this article cannot provide a complete application code for a real smart card communication, as JavaScript does not have direct access to smart cards. Instead, we offer a basic user interface to facilitate learning. The JavaScript and HTML code receive two numbers from the user and provide buttons for the four basic operations. The selected operation displays the result on the screen.
The actual Java code and smart card communication details will be discussed in the subsequent sections.
Finally
In addition to introducing Java Smart Card technology, this article also highlighted the Mini Calculator application. Secure identity authentication and other security-focused applications depend heavily on smart card applications. We encourage you to analyze the Java code and communication details in order to learn more about smart card technology and create a genuine smart card application.
A highly knowledgeable writer at By5.org, Claire Richardson delivers captivating and content-rich articles, providing valuable insights. Her commitment to accuracy and reliable sourcing ensures credibility. As a key member of By5.org’s team, she enriches minds and fosters a well-informed community.
