• Journal of Korea Society of Digital Industry and Information Management
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• v.12 no.3
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• pp.259-271
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• 2016

This study develops an extended model to predict customer satisfaction in easy payment systems based on information systems success model. Our data was collected from easy payment systems users and analyzed using PLS. This study selected four variables as easy payment systems characteristics(convenience, variety, security, speed) along with gender being used as a moderating variable. The results showed that convenience and security are turned out to affect customer satisfaction. Additionally, the test of difference in gender revealed that with respect to gender, moderating effects exist in security and speed. This implies that this study can provide different promotion strategies according to gender. Overall, the proposed model could be used to predict customers' willingness to pay on the easy payment systems.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.30B no.9
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• pp.27-35
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• 1993

In this paper, a new algorithm for high level security and quality of speech is proposed. The algorithm is based on the rearrangement of the fast fourier transform (FFT) coefficients with pre and post filter process, hamming window and adaptive pseudo spectrum insertion. Then, the pre and post filters are used for the whitening of speech spectrum and the adaptive pseudo spectrum is inserted for the unclassification of silence/speech. Also, the hamming window technique is applied for the robustness to the syncronization error in the telephone line. According to the simulation results, it can be seen that the security of scrambled signal and the quality of descrambled signal have been improved fairly in both subjective and objective performance test and the new FFT scrambler is robust to the synchronization error.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.337-339
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• 2012

스마트폰 사용자의 증가와 함께 이동통신망의 데이터 트래픽이 폭증하고 있다. 유입되는 트래픽 중 비정상적, 악의적인 트래픽이 발생하고 있지만, 이동통신 데이터망의 보안 시스템은 미비한 실정이다. 이 논문에서는 이동통신 데이터망으로 유입되는 악의적인 트래픽 및 비정상 트래픽에 대응하기 위하여 이동통신 데이터망의 구성과 발생 가능한 위협을 정리하였다. 그리고 대응 시스템을 마련하기 위해 필요한 테스트베드가 갖춰야 할 요구사항을 정리하였다. 이 요구사항을 준수하여 테스트베드를 구축하면 이동통신 데이터망의 위협에 대응하는 시스템의 설계 및 실험에 많은 도움을 줄 수 있을 것이다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.4
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• pp.2237-2253
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• 2017

For the existing security problem based on Fuzzy Vault algorithm, we propose a cancelable fingerprint template encryption scheme in this paper. The main idea is to firstly construct an irreversible transformation function, and then apply the function to transform the original template and template information is stored after conversion. Experimental results show it effectively prevents the attack from fingerprint template data and improves security of the system by using minutiae descriptor to encrypt abscissa of the vault. The experiment uses public FVC2004 fingerprint database to test, result shows that although the recognition rate of the proposed algorithm is slightly lower than the original program, but the improved algorithm security and complexity are better, and therefore the proposed algorithm is feasible in general.

• The Journal of Information Technology
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• v.12 no.4
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• pp.1-10
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• 2009

The robustness of communication service should be guaranteed to validate its security of the whole service not just high performance. One kind of practical test-beds is the chinese communication service based on SIM Card and GSM. In paper, we try to experiment the possibility of SIM cards clone in various mobile communications using 2G in china, and hence discovered the security vulnerabilities such as the incoming outgoing, SMS service and additional services on the mobile phones using clone SIM cards. The experiments show that chinese communication service should be prepared the Fraud Management System against the cloning SIM card. and furthermore, regulations related to the communication service should be tuned the realistic security environments.

• Journal of Computing Science and Engineering
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• v.5 no.1
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• pp.51-70
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• 2011

This paper introduces a new credit card payment scheme called No Number Credit Card that can significantly reduce the possibility of credit card fraud. The proposed payment system is loosely based on Kerberos, a cryptographic framework that has stood the test of time. In No Number Credit Card, instead of card numbers, only payment tokens are exchanged between the customers and merchants. The tokens are generated based on the payment amount, payment type, client information, and merchant information. However, it does not contain the credit card number, so the merchant or a database hacker cannot acquire and illegally use any credit card numbers. The No Number Credit Card system is ideal for online e-commerce transactions and can be used with any credit card that users possess. It can be used with minor modifications to the current card payment system. We provide the principles of its operation through scenario analysis, a sample implementation, and a security analysis

• Journal of the Korea Safety Management & Science
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• v.15 no.2
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• pp.151-159
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• 2013

This paper reviewed the relationship between internal marketing(management support, education, pay system, internal communication, employment security) and food safety climate(prevention, superior attitude, work condition), and the moderating effect of employment type(permanent or temporary employees) in food service company. Based on the responses from 304 responses, the results of hierarchical multiple regression analysis showed that 4 factors(management support, education, internal communication, employment security) effect positively on food safety climate(prevention, superior attitude, work condition). The positive effect of internal communication on superior attitude and work condition appeared to be more positive in permanent employees than in temporary employees. And the results of t-test analysis showed that permanent employees perceived more positively all internal marketing factors(management support, education, pay system, internal communication, employment security) and food safety climate(precaution, superior attitude, work condition) than temporary employees.

• Proceedings of the KIEE Conference
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• 1997.07e
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• pp.1887-1889
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• 1997

This paper reports the principle, design, configuration, and test results of the fiber optic security system using multimode fiber. In this system, optical fiber works as a sensing element. The length of sensing element may be from several meters to several killometers. Physical principle of this system is the dependence of interferometric pattern on the end of the fiber on mechanical perturbation in the area, where this fiber is situated. Near and far field patterns of the output light for multimode fiber are speckle pattern. A number of speckles on the fiber depends on mode numbers. Light intensity in each point of the fiber end depends on phase difference of modes. Finally we introduced a "Fiber Optic Security System based on Multimode" Fiber which we developed, it may be available in the field of the important area and building.

• Journal of the Semiconductor & Display Technology
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• v.7 no.1
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• pp.59-65
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• 2008

There are no products, systems to manage health and detect security for infant, the old and the weak in Korea. Recently, the concerns of parents are increasing more about all of children(baby, infant, etc) because rate of birth is decreasing gradually. Also, the average span of human life is on an increasing trend according to well-being and evolution of medical treatment. Therefore, this treatise analyzed problems in managing and following-up infant, the old and the weak at present. By using TRIZ to solve problems, we devised new conceptional ideas, detail designs to manage health, detect security, cope with correspondences for them and developed the prototype and tested it. Excellent performances are proved through various field test.

• Journal of Families and Better Life
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• v.10 no.2
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• pp.191-208
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• 1992

The study is focused on the perception of husbands and wives family financial security and satisfaction with quality of family life. Data was collected from the husbands and wives in Seoul. Eligibility was limited to family units with husband, wife, and at least one child. 852(Husbands:432, Wives: 420) out of 1200 respondents were finally selected as datum sources. The data was analyzed by Frequency, OneWay-ANOVA, t-test, Pearson' correlation and regression analysis. The major findings are the following: 1) In regard to the perception of family income adequacy, wives' perception was higher than husbands'. On the family financial problem, husbands had more experienced the financial problem than wives. 2) Marriage education, family income, husbands and wives education , and savings effected satisfaction with quality of family life. and husbands are more satisfaction with quality of family life than wives. 3) Determined the impact of the perception of family financial security on the satisfaction with quality of family life was 41% for wives and 33% for husbands, respectively.