• Journal of Korea Multimedia Society
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• v.10 no.9
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• pp.1197-1208
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• 2007

These days, most of SMART card, JAVA card, picked up the JAVA Card Platform gets the position as a standard. Java Card technology provides implantation, platform portability and high security function to SMART Card. Compared to normal Smart Card, JAVA card has a defect that is a low running speed caused by a distinctive feature of JAVA programming language. Factors that affect JAVA Card execution speed are the method how to save the data and install the applets of JAVA Card installation instrument. In this paper, I will offer the plan to improve JAVA Card program's loading and execution speed. At Java Card program, writing, updating and deleting process for data at EEPROM can be improved of Java Card speed by using high speed RAM. For this, at JAVA Card as a application of RAM, I will present prefetching LRU-ORL Buffer Cache Technique that is suitable for Java Card environment. As a data character, managing all data created from JAVA Curd at Buffer Cache, decrease times of recording at maximum for EEPROM so that JAVA Card program upload and execution speed will be improved.

• Journal of Korea Multimedia Society
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• v.5 no.2
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• pp.231-238
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• 2002

As electronic commerce is becoming more popular on the Internet, smart cards have been used for safe transfers and transactions on I-commerce popularly. Especially, Java Card considered as a COS for the next generation must take advantage of the good points of Java Language by using this language and making programs asked for by various demands. In this paper, we proposed efficient management system of mileage on the Internet using Java Card. The system has security for data and the simplicity of application development by Java Card cryptography. The system is an independent program saved un Java Card and can calculate and save mileage, although the characteristic of the mileage is different from others through the calculating Process of the Card. Also, the system is developed to encourage the efficiency of a system after comparing and contrasting between established systems and the newly designed one in simulation.

• Journal of Korea Multimedia Society
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• v.6 no.7
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• pp.1200-1208
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• 2003

Java Card technology allows us to run Java applications on smart cards and other memory-constrained devices. Java Card technology supports high security, portability and ability of storing and managing multiple applications. However, constrained memory resources of the Java Card Platform hinder wide deployment of the Java Card applications. Therefore, in this paper we propose a bytecode optimization algorithm to use the memory of a Java Card efficiently. Our algorithm can reduce the size of the bytecode by sharing the memory of the parameters of the catch clause in the try-catch-finally sentence.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.427-429
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• 2002

이동형 무선 단말기의 사용이 급증함에 따라, M-commerce 시대로 바뀌고 있다. 특히 USIM 카드가 내장되어 있는 IMT-2000 서비스가 시작되면, 무선 인터넷 시장은 급속도로 발전할 것이다. 본 논문은 무선 인터넷 응용 프로그램의 개발을 위하여 USIM 카드 상에서의 Java Card를 활용한다. Java Card는 자바 언어를 사용하여 프로그램을 개발할 수 있으며, 다양한 어플리케이션의 개발이 가능하다. 본 연구는 Java Card의 유용성을 증명하기 위하여 실제 생활에 적용 가능한 지불 솔루션으로서 전자화폐 시스템과 마일리지 시스템을 개발한다. 즉, One 카드 개념으로서 USIM 카드 하나로 다양한 기능을 제공할 수 있다는 것을 증명한다.

• 전자공학회논문지 IE
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• v.43 no.1
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• pp.46-51
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• 2006

Recently, smart card system which is known as easy to portable and also safe from physical, electrical, and software attack is observed to manage information that becomes the target of security in safety. And java card graft upon java technology to smart card platform is having very good advantage with object-oriented techniques and also, java card have the open type OS that can show the same action in different hardware characteristic which allows various application programs. In this paper, we introduced independent execution characteristic of java platform because being set to each smart card was uncomfortable till now and we designed access control member card that allows several administrators in different access privilege by single card using java card. Several administrators can approach to various information of file type that is included on issued card to user by using different PIN. In the proposed method, confirmation of personal information, administration contents update, demand by contents, is possible by single card. At this moment, wish to do safer user certification that improve security limitation which is from PIN, used for user certification, and signature data. In the proposed method, as design and implementation of utilization technology of java card, biometrics, user certification which uses multi PIN, provide that more safety and conveniently.

• 한국컴퓨터산업교육학회:학술대회논문집
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• 2003.11a
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• pp.111-118
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• 2003

Java Card API written to optimize Execute Environment in embedded device of small memory such as smart card. Java Card API intended to provide many advance when develope smart card based program. this paper purpose to implement RSA Algorithm of public key Algorithms with Java Card API.

• The KIPS Transactions:PartC
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• v.13C no.3 s.106
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• pp.275-282
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• 2006

There are several independent applets to support various applications in a Java Card. Each applet in a Java Card processes and manages its own data without concern to other applets and their data. In this paper we proposed file system API to support efficient file management based on Java Card. Also we designed and implemented Java Card based file system API using basic API and referring to the file system standard defined in ISO 7816-4 Smart Card standard. By using proposed file system API, we can replace duplications of same code in each applet with short method call. So the used memory space and processing time is reduced and also the reduction of development time and cost will be expected.

• The KIPS Transactions:PartC
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• v.10C no.5
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• pp.585-594
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• 2003

Java card is one of promising smart card platform with java technology. Java card defines necessary packages and classes for Embedded device that have small memory such as smart card Jana card is compatible with EMV that is Industry specification standard and ISO-7816 that is international standard. However, Java card is not offers user authentication protocol. In this paper, We design and implement an user authentication protocol applicable wireless devices based on Java Card using standard 3GPP Specification (SMS), Java Card Specification (APDU), Cryptography and so on. Our Java Card user authentication techniques can possibly be applied to the area of M-Commerce, Wireless Security, E-Payment System, Mobile Internet, Global Position Service, Ubiquitous Computing and so on.

• The Journal of Information Technology
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• v.10 no.3
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• pp.59-75
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• 2007

Java Card has several applets running on card, and applet can be added easily. Each applet supports different application programs, and includes file system for data management. This paper presents design and implementation of the file system API based on Java Card for the efficient data management in need of the applet. We referred the smart card international standard ISO7816-4 for the file system and used API supported at Java Card. Results show that it is easy to design and operation of file systems during the applet development, also show lighting of applet's source codes and improved access times.

• Journal of the Korean Data and Information Science Society
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• v.20 no.1
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• pp.125-137
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• 2009

Smart card has a small sized micro computer chip. This chip contains processor, RAM, ROM, clock, bus system and crypto-co-processor. Hence it is more expensive, complicated and secure chip compared with RFID tag. The main application area of smart card is e-banking and secure communications. There are two kinds of smart card platforms; open platform and closed one. Java card is the most popular open platform because of its security, platform independency, fast developing cycle. However, the speed of Java card is slower than other ones, hence there have been hot research topics to improve the performance of Java card. In this paper, we propose an efficient transaction buffer management to improve the performance of Java card. The experimental result shows the advantage of our method.