Know more about Java card 2.0

● This content starts with an introduction to smart cards and a brief review of ISO 7816, the smart cards conventional.

● Given the background on smart cards in previous Java Designer content, this sequel will begin with an answer to the question, “What is a Java Card?” and an introduction to the Java Card program structure.

● Next, we’ll focus on the many issues particular to the Java Card, including the Java Card lifecycle; the Java Card 2.0 language part and API collection classes; and Java Card protection.

● Then we’ll discuss the Java Card playback environment and show how a Java Card runs. We’ll close with an lighting example: Searching for wallet program written just for the Java Card.

What is a smart card?● Identical to the size of a bank credit cards, a smart

cards stores and processes details through the digital tour included in rubber in the plastic substrate of its body.

● There are two primary kinds of smart cards: A smart smart cards contains a micro-processor and offers study, write, and determining capability, like a small microcomputer.

● A storage, on the other hand, does not have a micro-processor and is meant only for details storage. A storage uses protection reasoning to control the accessibility of storage.

Smart Card

Smart Card

● All smart cards contain three kinds of memory: chronic non-mutable memory; chronic mutable memory; and non-persistent mutable storage.

● ROM, EEPROM, and RAM are the most widely-used storage for the three specific kinds in the current smart cards. Persistent storage is generally known as non-volatile storage.

● We will use the conditions chronic and non-volatile interchangeably in this post.

ISO 7816 aspect 1-7, defined by International Standard Organization, contains a set of requirements that covers various aspects of smart cards. ISO 7816 comprises of:

● Physical features (part 1)● Measurements and of the connections (part 2)● Electronic alerts and Transmitting methods (part 3)● Inter-industry instructions for switch (part 4)● Application identifiers (Part 5)● Inter-industry details elements (Part 6)● Inter-industry instructions for SCQL (Part 7)

● Normally, a smart cards does not contain a energy source, a display, or a key-board. It communicates with the outside globe using the sequential interaction interface via its eight contact points.

● The size and of the connections are covered in aspect 2 of ISO 7816. This plan shows the connections on a smart cards.

● A smart cards is placed into a Card Approval System (CAD), which may connect to another computer. Other conditions used for the Card Approval System are international airport, reader, and IFD (interface device).

● They all provide the same primary functions, namely to provide them with energy and to establish a data-carrying connection.

● When two computers get in touch with each other, they exchange details offers, which are constructed following a set of methods.

● In the same way, smart cards speak to the outside globe using their own details offers — known as APDU (Application Protocol Data Units).

● APDU contains either a control or a reaction message. In them globe, the master-slave model is used whereby a smart cards always performs the inactive role.

● In other words, a smart cards always stays for a control APDU from a international airport.

● It then carries out the action specified in the APDU and responses to the international airport with a reaction APDU.

● Command APDUs and reaction APDUs are interchanged on the other hand between a credit cards and a international airport.

What is a Java Card?A Java Card is a smart cards that is capable of running Java programs. The Java Card 2.0 requirements was published at http://www.javasoft.com/javacard.

● It contains details for building the Java Card virtual machine and program development interface (API) in smart cards.

● The minimum program requirement is 16 kilobytes of read-only storage (ROM), 8 kilobytes of EEPROM, and 256 bytes of ram (RAM).

Java Card

● The program structure on the Java Card is shown in the following determine.

● As shown in the determine, the Java Card VM is built on top of a particular incorporated routine (IC) and native os implementation. Thus you can join the institute of Java developer to make your career in this field.

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