• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.3
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• pp.137-142
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• 2011

Increasing users of smart phone and various marketing strategies activate lots of mobile mileage services recently. Such a mileage service is a typical marketing service to increase brand loyalty of clients and maximize purchase motivation. However, traditional offline mileage services introduce discomfort that users have to carry lots of mileage cards physically. Also, in case of using digital mobile mileage service, users have to search specific card to use from lots of digital cards stored in his mobile device. In this paper, to solve the problems, we design and develop a mobile mileage service system that especially discover a proper card automatically based on location information of user.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.3
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• pp.9-21
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• 2010

Recently, famous online shopping websites were hit by hacking attack, and many users' personal information such as ID, password, account number, personal number, credit card number etc. were compromised. Hackers are continuing to attack online shopping websites, and the number of victims of these hacking is increasing. Especially, the exposure of credit card numbers is dangerous, because hackers maliciously use disclosed card numbers to gain money. In 2007 Financial Cryptography Conference, Ian Molly et al. firstly proposed dynamic card number generator, but it doesn't meet reuse resistant. In this paper, we analyzed security weaknesses of Ian Molly's scheme, and we proposed a new one-time virtual card number generator using a mobile device which meets security requirements of one-time virtual card numbers. Then, we propose one-time credit card number generation and transaction protocol using Integrated Authentication Center for user convenience and security enhancement.

• Journal of KIISE:Information Networking
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• v.29 no.6
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• pp.645-653
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• 2002

The WPP payment protocol uses the WAP protocol to enable credit card payment on the wireless internet. Since the security of the WAP protocol is based on the WTLS security protocol, there exists an end-to-end security weakness for the WPP payment protocol. This paper is suggesting a payment protocol, which is making use of the Public-Key Cryptosystem and the Mobile Gateway, so assuring end-to-end security independently of specific protocols. As the on-line certification authority is participating on the authentication process of the payment protocol, the suggested payment protocol enables wireless devices to get services from service providers on other domains.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06a
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• pp.116-119
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• 2011

Mobile devices are increasingly used, and changed persons' social habits of creating new relationship. While existed systems can not satisfied the principles of user-centered, convenient and ensure privacy. This paper describes an intelligent name-card exchange technique in context-aware smart phone, which has no verbose user operation, ability of intelligent match based on context-aware information, and privacy protection.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.7
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• pp.1693-1700
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• 2010

Field data acquisition is faster in PDA-based mobile environment compared with document-based data acquisition, ensuring accurate data acquisition. However, portable DAQ systems of mobile environment can effectively replace DAQ systems embedded in computers but are less capable than DAQ systems embedded in computers and usually used in environments different from computers, causing noises whose cause are characteristics not certainly known. Therefore, in order to collect mobile-based field data, CompactFlash card-based hardware prototypes are suggested and mobile applications which guarantee acquisition of large amount of data with low hardware capability are performed. According to the test, mobile environments such as PDA were proved to be an effective way of collecting large amount of data. However, hardware performance has major effects on sequential data acquisition in mobile environments regardless of data display.

• Journal of The Korean Association of Information Education
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• v.11 no.2
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• pp.139-146
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• 2007

Today, using RFID(Radio Frequency Identification) card is extended in diversity as medical treatment, circulation market, military affairs, manufacture, security, etc. The RFID technology is an automatic identification method, relying on storing and remotely retrieving data for the purpose of identification using radio waves. This advantage of the RFID will be as a replacement for traditional Barcoding. Besides, book-lending system and attendance management system become the center of educational institution in interest. This paper presents a attendance management system using the RFID card which provides directly information of attendance for professors with mobile and students with web. Also, the students only have ID card that embed RFID tag which is recognized attendance through DB that storages to is received a information of student from RFID card Reader. And it is possible management or report for attendance and time table not only for professors by management program but also for students by web program.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.42 no.3
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• pp.391-398
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• 2022

The use rate of M-pass(transportation card for foreigners),developed and sold to provide convenience to foreign tourists, was only 0.0051 % of visitors to Seoul over the past five years. Even this poor sales fell to the 0.024 % level in 2020 due to COVID-19. The cause of the sluggish performance was that the Ministry of land, Transport and Maritime Affairs and the card issuer excluded transportation operating organizations, and problems such as poor public relation, irrationality in pricing, and limitied number of sales locations appeared. In order to solve this problem, the research result showed that business strategies such as the establishment of a digital marketing system, realistic pricing, and the establishment of a mobile sales system that fit the trend, as well as the development of new product that reflect the participation and opinions of all related organizations are necessary. It is expected that this study will not only provide convenience to foreign Seoul tourist in the age of Post Corona, but also help improve the management of subway operating organizations.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.1
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• pp.5-15
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• 2015

Electronic transactions have been increasing with the development of the high-speed Internet and wireless communication. However, in recent years financial corporations and mobile carriers were attacked by hackers. And large numbers of privacy information have been leaked. In particular, in the case of credit card information can be misused in the online transaction, and the damage of this given to cardholder. To prevent these problems, it has been proposed to use a virtual card number instead of the actual card number. But it has security vulnerability and requires additional security infrastructure. In this paper, we analyzed the proposed virtual card number schemes. and we propose a new virtual credit card number scheme. In the newly proposed scheme, cardholder generates a key pair (public key/private key) and pre-register public key to the issuer. then, cardholder can pay no additional security infrastructure while still efficiently satisfy the security requirements.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.24 no.6
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• pp.1045-1053
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• 2014

In this paper, we assume that the information leakage through side-channel signal may occur from the card payment terminal and newly introduce a real application attack model. The attack model is a side channel attack based on vibration signals, which are detected by a small sensor attached on card terminal by attacker. This study is similar to some other studies regarding side channel attack. However, this paper is different in that it is based on the non-language model. Because the financial transaction information such as a card number, password, mobile phone number and etc cannot have a constant pattern. In addition, there was no study about card terminal. Therefore, this new study is meaningful. We collected vibration signals on card terminal with a small wireless sensor and analyzed signal data with statistical signal processing techniques using spectrum of frequency domain and principal component analysis and pattern recognition algorithms. Finally, we evaluated the performances by using real data from the sensor.

• Journal of Navigation and Port Research
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• v.28 no.10 s.96
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• pp.881-889
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• 2004

Using the ETC Service, it is now possible to charge a vehicle for driving pass a specific toll booth electronically, without the vehicle even having to slow down. The smart card and card reader used to collect tolls electronically have a serious problem which it dose not have a standard for the ETC system. In this paper, we suggest the ETC system using mobile phone to collect tolls efficiently instead of existing system which is consist of a Interface Module to connect between a mobile phone and OEE, a mobile phone to send the information of tollgate fees and OEE to communication with RSE of roadway in the vehicle. This primary focus of this system is the IM functions and protocol to assist of the existing mobile phone and OBE.