• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.2005-2008
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• 2003

M-Commerce에서 전자 서명은 필수적인 요소이다. 본 논문에서는 PKI를 기반으로 모바일 단말기에서 약정이나 계약을 체결할 수 있는 전자 서명 시스템을 설계 구현한 예를 보인다. 이를 위해 XML 구조의 계약서를 저작할 수 있는 도구를 개발하고, 계약서를 관리하는 서버와 PDA 단말기 상에서 전자 서명하는 모듈 그리고 고객이 계약을 확인할 수 있는 시스템을 구현하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.226-228
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• 2005

최근 모바일 단말기를 이용한 전자상거래 서비스가 활발해 짐에 따라, 사용자 및 서비스 제공자간의 통신 안전성 확보가 중요한 문제로 인식되고 있다. 지금까지 제안된 대부분의 모바일 프로토콜들은 상호 안전한 키 교환을 위해 Diffie-Hellman 알고리즘을 사용하고 있다. 본 논문에서는 BCY 및 ASK 프로토콜을 통해서 Diffie-Hellman 알고리즘 기반 모바일 프로토콜의 상호 키 교환 및 인증절차를 살펴보고, Casper 및 FDR 도구를 이용하여 무선환경기반 M-Commerce 프로토콜의 안전성을 분석하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10c
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• pp.622-624
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• 2002

M-Commerce에서 안전한 서비스를 제공하기 위해서는 보안 기능을 갖춘 결제 솔루션이 필수적이다. M-Commerce를 이용하기 위한 사용자의 이동 단말기는 핸드폰, PDA, 스마트폰 등으로 다양화 되어가고 있으며, 이 중에서도 PDA의 인터페이스와 이동 접속은 기존 핸드폰의 유선 인터넷의 정보 의존도가 높은 단점을 극복할 수 있다. 본 논문에서는 타원곡선 암호를 이용하여 PDA 기반의 신용카드 결제 시스템을 설계하였다. 제안된 시스템의 SECURE CARD모듈은 PDA 단말기 자체에 개인정보, 배송정보, 카드정보를 암호화하여 안전하게 저장함으로써 단말기의 정보입력시에 필요한 불편함을 제거하였다. 또한 프로토콜은 M-Commerce에서 인증, 기밀성, 무결성, 부인봉쇄 서비스 등의 보안기능을 제공하도록 설계되었다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.2B
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• pp.289-298
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• 2004

Recently, mobile commerce is widely spread around the world according to fast growth of the mobile communication market. The existing digital document is not well fit in mobile commerce because of weakness of the hardware of mobile devices, low bandwidth of wireless communication, and the constraints of the size and resolution of the display. In this paper, we analyzed the elements of the digital document proper for mobile commerce based on wireless communication, designed the XML form for the digital document, and implemented the X-Auth which is an authoring tool for the XML digital document. X-Auth does not require that the author or user know XML. And also it makes it possible to create the digital document fit for the size of the mobile device display and therefore remove inconvenience due to the scrolls.

• The Journal of Korean Association of Computer Education
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• v.7 no.4
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• pp.61-66
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• 2004

Electronic commerce that use Mobile Phone according as the radio Internet develops rapidly and performance of Mobile Phone develops is activated. It is said that electronic commerce that use these Mobile Phone is M-Commerce. Also, the most important controversial point is data security or an user certification technology at these electronic commerce, there are research reactor WPKI and WTLS about this technology. However, when transmit message again after sign electronic documents in Mobile Phone, if do not encrypt, danger exists to be exposed to outside. Therefore, in this paper, designed system to encipher document that handle and handles user certification applying XML electronic sign technique in Mobile environment. Prevent of XML electronic sign in Mobile environment through this paper, and can stave off danger from outside by enciphering electronic sign document.

• The KIPS Transactions:PartD
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• v.10D no.3
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• pp.559-566
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• 2003

As cell phone and PDA have been in common use recently, there is a growing tendency to utilize the mobile terminals for M-Commerce. The information security and the receipt of e-trade are very important to support reliable digital transactions in wireless environment as in wired environment. Even though some work such as WML digital signature and WPKI has been studied for M-Commerce, there are several problems on the aspects of the functional limitation of the mobile terminals and the unsecure data transformation of WAP gateway. In this study we have designed and implemented a prototype system of issuing and verifying the electronic receipt that guarantees authentication, data integrity and non-repudiation for secure mobile e-commerce. Moreover, we have enhanced the system performance by letting the trusted independent server verify and manage the electronic receipt.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.15
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• pp.6437-6441
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• 2014

Background: Oridonin isolated from Rabdosia rubescens, a plant used to treat cancer in Chinese folk medicine, is one of the most important antitumor active ingredients. Previous studies have shown that oridonin has antitumor activities in vivo and in vitro, but little is known about cell cycle effects of oridonin in gastric cancer. Materials and Methods: MTT assay was adopted to detect the proliferation inhibition of SGC-7901 cells, the cell cycle was assessed by flow cytometry and protein expression by Western blotting. Results: Oridonin could inhibit SGC-7901 cell proliferation, the $IC_{50}$ being $15.6{\mu}M$, and blocked SGC-7901 cell cycling in the $G_2/M$ phase. The agent also decreased the protein expression of cyclinB1 and CDK1. Conclusions: Oridonin may inhibit SGC-7901 growth and block the cells in the $G_2/M$ phase by decreasing Cdk1 and cyclinB1 proteins.

• International Commerce and Information Review
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• v.3 no.1
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• pp.7-24
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• 2001

많은 기업들이 e-Business를 적극 추진하고 있으나, 기대한 만큼의 경영성과를 올리고 있는 기업은 거의 없는 실정이며, 더 나아가 e-Business의 회의론까지 대두되고 있는 실정이다. 그럼에도 불구하고 e-Business는 Product & Service Leadership, Operational Excellence, Customer Intimacy 확보 차원에서 지속적으로 성장할 것으로 예상된다. 따라서 Off-line 기업의 IT 설비투자 확대, Off-line 기업과 온라인 기업간의 적절한 조화, 기업간 협력 활성화, 닷컴 기업의 경쟁력 확보 등이 갖춰지면 e-business는 향후 우리에게 새로운 도전과 기회를 제공할 것이다.

• The KIPS Transactions:PartC
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• v.10C no.5
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• pp.575-584
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• 2003

Due to hardware resource limit and system incompatibility of the mobile device, and low bandwidth of wireless communication, there are a few difficulties in introducing the digital contract system based on wired communication to M-Commerce. To get over the difficulties, this paper defines a digital contract based upon XML and then addresses the design and implementation of M-XContract, a digital contract system for the mobile environment. M-XContract system has been constructed with the digital contract server, M-ESign module which contracts with the customer on the PDA and transfers the contract digitally signed to the server, M-EDecoder module which shows the contract to the customer from the server, and X-Auth which is a contract authoring tool. To evaluate the run-time performance of the M-XContract, we measured the digital signature generation time and transfer time to the server. The evaluation results show that the M-Xcontract is an efficient model for the mobile contract system.

• The Journal of Information Systems
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• v.8 no.1
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• pp.45-63
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• 1999

Today, information society is affected by new technologies including Electronic Commerce(EC), Electronic Data Interchange(EDI), Commerce At Light Speed(CALS ), multimedia and teleconferencing. Electronic Commerce is believed to be a field that will bring about a huge revolution of human life in the 21st century and thus its industry will give greatly influential effect on other industries In this paper, we have surveyed and studied through the internet and related materials for the development of framework of Electronic Commerce. It is required that we need the leading role of our government for the earlier activation of Electronic Commerce usage and have to establish the solid background of EC technology creation of our nation's originality and to activate the venture industry oriented for idea and technology rather than the industries in the form of larger enterprises. In conclusion, we have to expand our own ability of research and development to keep the continuous growth of our Electronic Commerce market and industries through the development of new product and prior acquisition of market as well as to expand the path of various technology aquisition by the strategic M&A and capital investment with the leading foreign enterprises.