• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.700-702
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• 2001

As computers and networks become popular, distributing information on the Interment is common in our daily life. Also, the explosion of the Internet, of wireless digital communication and data exchange on Internet has rapidly changed the way we connect with other people. But secure mall is gamins popularity abroad and domestically because of their nature of prodding security. That is. it has been used a variety of fields such as general mail and e-mail for advertisement But, As the data transmitted on network can be easily opened or forged with simple operations. Most of existing e-mall system don't have any security on the transmitted information. Thus, security mail system need to provide security including message encryption, content integrity, message origin authentication, and non-repudiation. In this paper, we design implement secure mall system with non-repudiation service and encryption capability to provide services for certification of delivery and certification of content as well as the basic security services.

• Journal of KIISE:Information Networking
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• v.28 no.3
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• pp.321-335
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• 2001

The explosive growth in wireless networking increasingly urges the demand to support mobility within the Internet which is what Mobile-IP aims to provide. Because the transmission of signals through open-air s easy to be attacked, it is important to provide secure transmission for mobile users and make them responsible for what they have done in networks. Although IETF provides a secret-key based security mechanism, those mechanisms suffer from scalability, efficiency and non-repudiation service problem. The proposed mechanism uses public-key based authentication optimizing the performance. It includes non-repudiation service on the side of mobile for airtight security in wireless network. The simulation results show that the proposed authentication reduces the total registration time. It especially minimizes the computation cost on the side of the mobile node and solves the power problem. In practice, the proposed authentication is feasible with reasonable performance and security service in macro mobility that Mobile-IP is intended to solve.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1991.11a
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• pp.155-164
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• 1991

컴퓨터가 널리 보급되고 정보통신 기술이 발전함에 따라 지리적으로 먼거리에 있는 사람에게 정보를 주고받을 수 있게 되었는데, 안전한 데이타의 송수신은 그 중요성이 더해가고 있다. 이런 시점에서 ISO가 OSI 환경에서 안전성 제공을 위해 IS 7498-2로 발표한 OSI Security Architecture에서는 5가지 안전성 서비스틀 제공하였다. 본 논문에서는 이들 중 이미 발생한 통신 사실을 부인할 수 없도록 하는 부인봉쇄 서비스를 제공할 수 있는 부인봉쇄 서비스 구현 모델을 MHS(Message Handling System)상에 설계하였으며, 구현방안을 제시하였다.

• Review of KIISC
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• v.6 no.1
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• pp.89-102
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• 1996

ISO 7498-2 정보보호 구조에서는 컴퓨터 네트워크 구조에서의 안전성 문제를 해결하기 위하여 5가지의 기본적인 정보보호 서비스로 인증, 액세스 제어, 무결성, 기밀성, 부인-봉쇄를 정의하였다. 이 가운데 부인-봉쇄는 이미 발생한 통신 사실을 부인할 수 없도록 송수신자간의 통신 사실을 증명해 주는 서비스이다. 이 서비스에 대해 ISO/IEC JTC1/SC27에서는 현재 일반 모델에 대해서는 CD 13888-1로 대칭 암호화 알고리즘 이용에 대해서는 CD 13888-2로 규정 중에 있다. 본 고에서는 부인-봉쇄에 대한 개념을 살펴보고, 부인-봉쇄 메커니즘을 중심으로 부인-봉쇄 서비스에 대하여 고찰하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.844-846
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• 2001

네트워크를 통해 전송되는 메시지, 즉 전자문서들은 송신자와 수신자가 직접 만나서 전해 주지 않는다. 이러한 경우 통신 상호간에 서로간의 메시지 송수신 여부를 쉽게 확인하기 어려운 특성이 있다. 따라서 메시지의 송신 부인 또는 수신 부인이 발생할 소지가 있다. 부인 봉쇄 서비스는 이러한 논쟁 발생시 송수신 쌍방간의 행위에 대한 증거를 제공하여 주는 서비스이다. 본 논문에서는 이러한 부인봉쇄 서비스를 위해 개입되는 세 3의 신뢰기관인 TTP(Trusted Third Party)의 기능을 확장시켜 부인봉쇄 서비스에서의 효율성을 향상시키는 프로토콜을 제안한다.

• The Journal of Information Technology
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• v.4 no.3
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• pp.1-17
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• 2001

This study is to examine some legal problems of cyber trade transactions and to suggest some policy implications to vitalize cyber trade by internet accomplishes electronic business from all process integration of production, marketing and customer service. However, there are some legal problems for the electronic commerce to be used in international trade activities such as trade contract transport documents and payment systems by internet. First international trade rules have to be legislated so that electronic documents has same legal function like traditional documents. Also electronic signature must has authenticity, integrity, non-repudiation, writing and confidentiality. Second, traditionally international payment systems such as letters of credits, remittance, documentary collections and open account have been operated as an important and popular method of payment. In the modern world of electronic commerce, information technology has made it possible to pay for the sale of goods and services over the internet. The payment methods such as Credit Card, Debit Card, Electronic Cash, Electronic Fund Transfers enable partly sellers, buyers and service providers to settle payment electronically through the internet. To settle the problems of payment systems, the security requirements for safe electronic Payments such as authenticity, integrity, non-repudiation have to be guaranteed. Also, electronic data interchange in transport documents has to be adopted and negotiability of electronic bills of lading has to be guaranteed. Electronic payment systems through SWIFT enable the sellers and the buyers to conduct and settle international business-to-business electronic commerce in case of solving the above problems and harmonizing the Bolero project.

• The Journal of Society for e-Business Studies
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• v.6 no.3
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• pp.101-113
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• 2001

Security is very important in EC(Electronic Commerce) environment because exchanged information(that is transaction details, private data, charges data(card-no, accounts), etc) is various and is very sensitive. So, In this paper, we propose Secure-ReXpis(Reliable St excellent Xh3 Processing Infrastructure) System that transfer message and support Message Level Security(Encryption/Decryption and Digital Signature). And we implement Message Confidentiality Service, User Authentication ＆ Message Integrity Service and Non-Repudiation Service among the various Security Services. This system support XML message format and EDI message, WEB Data and Private Format Data, etc.

• Journal of the Korea Computer Industry Society
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• v.2 no.9
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• pp.1233-1238
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• 2001

Security is very important at EC(Electronic Commerce) Environments. The reason is that exchanged data(that is user private information(accounts, card-no, password), transaction items, etc) is various and is very sensitive. In this paper, we propose the Secure-XML Messaging System(S-XMS) which is implemented to support Message Level Security, Encryption and Digital Signature. And we implement Message Confidentiality Service, User Authentication & Message Integrity Service and Non-Repudiation Service among the various Security Services.

• Journal of Internet Computing and Services
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• v.2 no.3
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• pp.51-62
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• 2001

Recently, as computers and networks become popular, distributing information on the Internet is common In our daily life. also, the explosion of the Internet. of wireless digital communication and data exchange on Internet has rapidly changed the way we connect with other people. The e-mail has been commonly used by users as well recognizing It as the standard of manners among users on the Internet. In the past, e-mail has been the primary choice of exchanging Information, but secure mail is gaining popularity abroad and domestically because of their nature of providing security. That is. it has been used a variety of fields such as general mail and e-mail for advertisement. But, As the data transmitted on network can be easily opened or forged with simple operations. most of existing e-mail system don't have any security on the transmitted information. Thus. security mail system need to provide security including message encryption, content Integrity, message origin authentication, and non-repudiation. In this paper, we design implement secure mail system with non-repudiation service and encryption capability to provide services for certification of delivery and certification of content as well as the basic security services. API.

• Journal of KIISE:Information Networking
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• v.29 no.4
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• pp.333-345
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• 2002

As computers and networks become popular, distributing information on the Internet is common in our daily life. Also, the explosion of the Internet, of wireless digital communication and data exchange on Internet has rapidly changed the way we connect with other people. But secure mail is gaining popularity abroad and domestically because of their nature of providing security. That is. It has been used a variety of fields such as general mail and e-mail for advertisement. But, As the data transmitted on network can be easily opened or forged with simple operations. Most of existing e-mail system don't have any security on the transmitted information. Thus, security mail system need to provide security including message encryption, content integrity, message origin authentication, and non-repudiation. In this paper, we design and implement secure mail system with secure key agreement algorithm, non-repudiation service, and encryption capability to provide services for certification of delivery and certification of content as well as the basic security services.