• Proceedings of the Korea Information Processing Society Conference
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• 2002.04b
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• pp.887-890
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• 2002

GSM(Global System for Mobile Communications) 표준은 전송되는 데이터를 암호화하여 사용하는 안전한 모바일 폰 시스템을 위해서 디자인되었다. 하지만, GSM이 더 이상 안전하지 않다는 것이 입증되고 있다. 그래서, 본 고에서는 GSM 이동통신상의 전자상거래 이용자들에게 보다 편리하고 안전한 서비스를 제공하기 위해서 새로운 모델을 제안한다. 본 고에서 제안하는 모델은 GSM의 사용자 인증을 개선하기 위해서 화자인증을 결합한 더 안전한 사용자 인증 방법을 제안하였고, 이 인증방법을 기반으로 하여 사용자인증 서비스를 어디에서 제공해 주느냐에 따른 모델에 대한 분석을 제시한다.

• Asia pacific journal of information systems
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• v.15 no.3
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• pp.223-241
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• 2005

In spite of the rapid growth of mobile multimedia contents market, most of the customers experience inconvenience, lengthy search processes and frustration in searching for the specific multimedia contents they want. These difficulties are attributable to the current mobile Internet service method based on inefficient sequential search. To overcome these difficulties, this paper proposes a MOBIIe COntents Recommender System for Movie(MOBICORS-Movie), which is designed to reduce customers' search efforts in finding desired movies on the mobile Internet. MOBICORS-Movie consists of three agents: CF(Collaborative Filtering), CBIR(Content-Based Information Retrieval) and RF(Relevance Feedback). These agents collaborate each other to support a customer in finding a desired movie by generating personalized recommendations of movies. To verify the performance of MOBICORS-Movie, the simulation-based experiments were conducted. The results from this experiments show that MOBICORS-Movie significantly reduces the customer's search effort and can be a realistic solution for movie recommendation in the mobile Internet environment.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.473-476
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• 2004

본 논문에서는 M-Commerce의 빠른 성장에도 불구하고, M-Commerce만을 위해 제작되어진 Contents 제공의 한계로 인하여 M-Commerce 활성화에 많은 어려움이 있다. 이와 같은 문제점을 줄이기 위한 해결책으로 기존에 연구되고 있는 M-Commerce 시스템에 URL Pattern 분석을 통해서 인터넷 상의 상점 정보 및 상품 디스플레이 URL 정보를 자동으로 수집하기 위한 UMM(URL Management Module)을 제안한다. 이 UMM의 적용으로 인하여 상품 검색을 해온 결과 기존 연구되고 있는 M-Commerce 시스템의 상품 검색보다 더 나아졌다. 이와 같은 상품 검색효율성의 개선은 실험을 통하여 알 수 있었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.812-815
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• 2010

최근 들어 안드로이드폰, 아이폰, 옴니아폰 등의 스마트폰 사용자가 많이 증가하고 있고 전자상거래 등 그 이용분야 또한 점점 증가되고 있는 추세이다. 많은 사용자들이 스마트폰 환경에 접어들면서 삶의 질이 향상되어지고 있다. 하지만 이렇게 모바일 환경으로 변화되면서 여러 가지 많은 문제점도 발견되어지고 있는데 그중 대표적인 이슈로 논의되어지고 있는 문제 중 하나가 스마트폰에서의 보안취약성에 대한 내용인데 본 논문은 스마트폰 중 안드로이드 환경에서의 보안문제를 짚어보고 악성코드 같은 바이러스로부터 이를 보호하기위해서는 어떤 점이 필요한지 개선안을 제시하고 이를 해결하고자 한다.

• Journal of Advanced Navigation Technology
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• v.17 no.5
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• pp.552-559
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• 2013

According to the recent increase of mobile commerce, the researches on electronic voucher payment based on NFC are lively made. However, most researches focus on the payment method using electronic vouchers, and so there is none for tracking circulation history of an electronic voucher. To address this problem, this paper proposes the method to store circulation information of an electronic voucher. The proposed method applies Object Memory Model (OMM) to an electronic voucher. When an electronic voucher is issued, transferred to other person, and used in payment, related information is stored at the object momory of an electronic voucher. So, our proposed object memory has three types of blocks, on which each information for issue, transfer, and payment of an electronic voucher is stored. We can retrieve and analyze the circulation history of an electronic voucher using this information. In the future, we will implement the proposed an electronic voucher and propose the method to analyze circulation information.

• Journal of Internet of Things and Convergence
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• v.6 no.2
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• pp.51-56
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• 2020

In this paper, we developed a mobile new media solution that enables e-commerce shopping mall operators, band operators, and YouTube creators to create synergies in online and offline promotion by posting related video contents on the media in addition to their own videos. By providing videos in the field of the platform without directly searching for them, it is possible to provide users with a new type of marketing means that can promote their platform while providing interest and information. Prospective creators at home and abroad who produce video can upload their own video in addition to YouTube and afreeca TV, such as the open market for video, and use independent and free charging systems to manage independent customer relationship management(CRM), self-branding, and content management. It will be possible to utilize mobile-based new media equipped with a system.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.12C
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• pp.1692-1706
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• 2004

Recently, there are rapid development of information and communication and rapid growth of e-business users. Therefore we try to solve security problem on the internet environment which charges from wire internet to wireless internet or wire/wireless internet. Since the wireless mobile environment is limited, researches such as small size, end-to-end and privacy security are performed by many people. Wireless e-business adopts credit card WPP protocol and AIP protocol proposed by ASPeCT. WAP, one of the protocol used by WPP has weakness of leaking out information from WG which conned wire and wireless communication. certification chain based AIP protocol requires a lot of computation time and user IDs are known to others. We propose a Micro-Payment protocol based on credit card. Our protocol use the encryption techniques of the public key with ID to ensure the secret of transaction in the step of session key generation. IDs are generated using ECC based Weil Paring. We also use the certification with hidden electronic sign to transmit the payment result. The proposed protocol solves the privacy protection and Non-repudiation p개blem. We solve not only the safety and efficiency problem but also independent of specific wireless platform. The protocol requires the certification organization attent the certification process of payment. Therefore, other domain provide also receive an efficient and safe service.

• The Journal of the Korea Contents Association
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• v.20 no.12
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• pp.492-497
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• 2020

Today, banks around the world are making great efforts to adapt to the rapidly changing internal and external environment changes caused by the development of IT technology and to gain a competitive advantage in the market. In particular, in line with the rapid growth of smartphone usage, financial services are also provided in a variety of ways using Fintech, and one of the fastest growing areas is mobile simple payment. Mobile payment service is a financial service that pays the purchase price using a portable mobile device. As fintech, a convergence of financial services and information technology, it is recently used not only in financial services, but also in various industries. It is used in all fields where payment functions such as distribution are available. In the case of mobile cards, it shows that the usage rate of people in their 20s and 30s is increasing very much, so it can be said that the use of mobile payment services will continue to increase in the coming future. We know that simple payments are being used. However, it can be said that the research on the use of mobile payment services by these teenagers is somewhat incomplete. Therefore, this study investigated what factors are important for Korean teenagers to use mobile payment services. As a result, among the five hypotheses presented in this study, all hypotheses were adopted except for , which states that cash usage habits have no effect on innovation.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.5
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• pp.715-721
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• 2018

With the spread of mobile devices, the users of social network services or e-commerce sites have increased dramatically, and the amount of data produced by the users has increased exponentially. E-commerce companies have faced a task regarding how to extract useful information from a vast amount of data produced by the users. To solve this problem, there are various studies applying big data processing technique. In this paper, we propose a collaborative filtering method that applies the tag weight in the Apache Spark platform. In order to elevate the accuracy of recommendation, the proposed method refines the tag data in the preprocessing process and categorizes the items and then applies the information of periods and tag weight to the estimate rating of the items. After generating RDD, we calculate item similarity and prediction values and recommend items to users. The experiment result indicated that the proposed method process large amounts of data quickly and improve the appropriateness of recommendation better.

• Journal of Korea Multimedia Society
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• v.7 no.4
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• pp.592-600
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• 2004

A recommendation system, which is an application area of e-CRM in e-commerce environment, provides individualized goods recommendation service that meets the demand of individual users. In general, existing recommendation systems require extensive historic user information in application domains. However, the method of recommendation based on static historic user information needs to respond flexibly to users'demand that changes rapidly and sensitively over time and in domains including a variety of users. In addition, it is difficult to recommend for new users who are not fall into any of existing domains. To overcome such limitations and provide flexible recommendation service, this study designed and implemented CPAR (Customer Preference Analysis Recommender) system that supports customer preference analysis and filter management. The filtering management capacity of the present system eases the necessity of extensive information about new users. In addition, CPAR system was implemented in XML-based wireless Internet environment for recommendation service independent from platforms and not limited by time and place.