• Smart Media Journal
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• v.12 no.2
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• pp.27-35
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• 2023

Currently, online user authentication is perform using joint certificates issued by accredited certification authorities and simple certificates issued by private agency. In such a PKI(Public Key Infrastructure) system, various cryptographic technologies are used, and in particular, digital signatures are used as a core technology. The digital signature scheme is equally used in DID(Decentralized Identity), which is attracting attention to replace the existing centralized system. As such, the digital signature-based user authentication used in current online services is also applied in the metaverse, which is attracting attention as the next-generation online world. Metaverse, a compound word of "meta," which means virtual and transcendent, and "universe," means a virtual world that includes the existing online world. Due to various developments of the metaverse, it is expted that new authentication technologies including biometric authentication will be used, but existing authentication technologies are still being used. Therefore, in this study, we study digital signature scheme that can be efficiently used for user authentication in the developing metaverse. In particular, we experimentally analyze the effectiveness of ECDSA, which is currently used as a standard for digital signatures, and Schnorr signatures, which can quickly verify a large amount of signatures.

• Review of KIISC
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• v.9 no.3
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• pp.43-58
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• 1999

눈부신 속도로 발전되고 있는 우리나라 사이버 증권거래에 대하여 비교적 자세히 분석하고 시급하고 절실히 요구되고 있는 증권업계의 전자서명 인증서비스를 준비하고 있는 증권전산 전자인증센터(signkorea)의 서비스 체계를 소개한다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1996.11a
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• pp.374-382
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• 1996

본 논문에서는 SM을 사용한 IC 카드의 인증 및 서명 프로토콜을 제안한다. SM은 연산 처리 능력이 우수하고, 안전한 보조 장치로 단말 내부에 장착된다. 제안된 프로토콜은 K nigs의 인증 방식, NIST의 ASACS, 그리고 UEPS와 비교하여 안전하고, 8비트 IC 카드에서 적합하게 개선하였다. 따라서 SM을 주민용 IC 카드의 단말에 장착하여 인증 및 디지탈 서명을 구현하는 방안을 제안한다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.196-198
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• 2004

현재 XML은 데이터의 표현에 있어서 가장 유연하고 독립성 있는 언어로 자리잡고 있으며 다양한 분야에서 활용되고 있다. 이러한 추세에 따라 OSGi 서비스 플랫폼 환경에서도 여러 서비스들이 자신의 데이터를 XML로 표현하고 있으며, 이를 기반으로 서비스 번들의 인증을 XML 전자 서명을 생성하여 수행할 수 있다. 현재 OSGi 에서는 PKI기반 서비스 번들 인중 메커니즘을 이용하고 RSH 프로토콜을 권고하고 있다. 그러나 저장 공간이나 연산이 제한된 환경에 있는 OSGi플랫폼 내에서 작동하는 데에는 어려움이 있다. 따라서 본 논문에서는 JAR파일로 제공되는 서비스 번들에 대해 별도의 연산이나 인증과정 없이 XML 전자서명을 생성하여 서비스 번들을 인증하는 메커니즘을 제시한다.

• Journal of Korea Multimedia Society
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• v.10 no.3
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• pp.373-380
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• 2007

In this paper we propose a new efficient authentication protocol that reduces overheads of computation for digital signature generation/verification on mobile devices in the Personal Area Network (PAN). In particular, we focus on eliminating the traditional public key operations on mobile devices without any assistance of a signature server. Moreover, the proposed protocol provides a simplified procedure for certificate status management to alleviate communication and computational costs on mobile devices in the PAN.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.373-376
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• 2007

This paper presents dynamic (on-line) signature verification using direction and speed information as feature information. We describe a detail method of the adjusted constant(W) in the suggested DTW for the speed between adjacent two points.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.14 no.2
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• pp.85-100
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• 2004

Study and analysis on the digital certification of the world today, and census on how digital signature is being used or considered for the government will be used to sum of what can be the difficulties and Problems in operating digital signature certifications for the government administrations at this research, and of course the answers to these problems will be provided too. This research suggests practical ideas on how to interoperate between Government PKI (GPKI: Administrational Digital Certification for the Government) and National PKI (NPKI: Digital Certification for General Public ＆Business), how to make use of Standard Security APIs, how to manage (e.g. issue, reissue, update, revoke) digital certificate, how to improve technical side of security and reliability, and how to improve political issues on public education for information security. Digital certification will become more popular and widely used in government administrations in the future. Therefore, census and research on demands md satisfactions of digital certification for public and government will be regularly performed. Of course, continuous maintenances and improvement in this field will be necessary to obtain firmer way of information security.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.65-69
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• 1999

인터넷 등 네트워크상의 거래에서의 인증은 주요한 인프라이다 네트워크상에서의 거래에서는 일반적 대면거래에서와 달리 상대방 확인과 내용에 대한 확인을 할 수 없다. 이러한 문제점을 해결해주는 것이 바로 인증이며 인증은 암호방식을 사용하며 신뢰받는 제3자에 의해 수행된다. 인증사업을 위한 제도적 뒷받침을 위해 각국은 디지틀서명 및 인증기관에 관한 디지틀 서명법을 제정하고 있으며, 민간부문 뿐만 아니라 공공부문을 포괄하는 상호인증을 가능케하는 국가적 차원의 공개키기반구조 확립에 주력하고 있다. 본고에서는 이러한 인증의 개념과 국내외 인증사업 및 정책에 대해 살펴보았다.

• Journal of the Korea Convergence Society
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• v.7 no.1
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• pp.49-55
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• 2016

In a delegate authentication, a user can lend his/her own authentication data to the third parties to let them be authenticated instead of himself/herself. The user authentication schemes based on the memory of unique data such as password, are vulnerable to this type of attack. Biometric authentication could minimize the risk of delegate authentication since it uses the biometric data unique by each person. Group authentication scheme is used to prove that each group member belongs to the corresponding group. For applications such as an electronic voting or a mobile meeting where the number of group members is changing dynamically, a new group authentication method is needed to reflect the status of group in real time. In this paper, we propose biometric authentication based dynamic group signature scheme. The proposed scheme is composed of biometric key generation, group public key creation, group signature generation, group signature verification and member update protocols. The proposed member update protocol is secure against colluding attacks of existing members and could reflect group status in real time.

• Proceedings of the CALSEC Conference
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• 1999.11a
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• pp.226-231
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• 1999

■ 디지털 콘텐츠(Digital Contents)란\ulcorner -컴퓨터상에서 Digital(0 또는 1)로 존재 하는 무형 의 데이터(예, 멀티미디어, 영상, MP3, S/W) ■ 디지털 콘텐츠 보호의 필요성 -불법복제 파일의 유통방지 -디지털 저작권 보호, 지적재산권 보호 -사용자 인증, 기밀성, 무결성 ■ 암호학적 방법 -공개키기반구조(PKI), 인증구조(X.509) -전자서명기법 (중략)