• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.1049-1051
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• 2007

생체인식 기술은 급속도로 발전하고 있지만 각각의 생체 정보를 이용한 단일 생체인식 기술은 생체 방식에 따라 여러 가지 문제점이 노출되고 있다. 따라서 두 가지 이상의 생체 정보를 결합하여 단일 생체인식 기술의 문제점을 극복하고 보다 좋은 인식률을 확보하기 위해 다중 생체 인식 시스템이라는 복합 시스템이 제안되었다. 본 논문에서는 웹 기반의 다중 생체 인식 시스템을 개발하여 이를 인터넷 전자입찰시스템에 적용하였다. 얼굴 및 음성 인식 정보를 이용하여 인증 시스템에 로그인 하도록 구현하여 일반적인 웹사이트에서도 다중 생체 인식 시스템을 적용할 수 있음을 보였다.

• The Journal of the Korea Contents Association
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• v.18 no.9
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• pp.141-148
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• 2018

Currently, the user authentication technology used by users to access multiple applications within an organization is being applied with ID/PW-based SSO technology. These user authentication methods have the fundamental disadvantages of ID/PW and SSO. This means that security vulnerabilities in ID/PW can lead to periodic changes in PWs and limits on the number of incorrect PW inputs, and SSO adds high cost of the SSO server, which centrally stores the authentication information, etc. There is also a fundamental vulnerability that allows others to freely use other people's applications when they leave the portal application screen with SSO. In this paper, we proposed an app-based 2-channel authentication scheme to fundamentally eliminate problems with existing ID/PW-based SSO user authentication technologies. To this end, it distributed centralized user authentication information that is stored on SSO server to each individual's smartphone. In addition, when users access a particular application, they are required to be authenticated through their own smartphone apps.

• Smart Media Journal
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• v.10 no.3
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• pp.48-53
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• 2021

The authentication process is a key step that should be used to verify that a user is legitimate, and it should be used to verify that a user is a legitimate user and grant access only to that user. Recently, two-factor authentication and OTP schemes are used by most applications to add a layer of security to the login process and to address the vulnerability of using only one factor for authentication, but this method also allows access to user accounts without permission. This is a known security vulnerability. In this paper, we propose a Zero Knowledge Proofs (ZKP) personal information authentication scheme based on a Smart Contract of a block chain that authenticates users with minimal personal information exposure conditions. This has the advantage of providing many security technologies to the authentication process based on blockchain technology, and that personal information authentication can be performed more safely than the existing authentication method.

• Review of KIISC
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• v.26 no.2
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• pp.14-19
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• 2016

국내 인증기술은 패스워드를 시작으로 X.509 인증서 기반의 공인인증 기술로 발전되어 왔고 현재는 패스워드의 보안 취약성을 개선하기 위해 개발된 FIDO 기술로 전환되는 과정에 있다. FIDO는 바이오 인증 기술뿐만 아니라 다중 인증 기술도 지원하는 범용인증기술로 FIDO 인증 서버를 한번만 설치하면 서비스 제공자의 요구사항에 따라 다양한 인증방식을 서버 변경 없이 수용할 수 있다는 장점을 가지고 있어, 금융, 결제 등 다양한 분야에 급속하게 확산되고 있다. 본 고에서는 범용인증기술인 FIDO 1.0 기술을 설명하고 최근에 표준화를 진행하고 있는 FIDO 2.0 기술에 대한 소개 및 FIDO 1.0 기술과의 차이점을 기술하여 FIDO 2.0이 가지는 여러 의미를 분석하여 향후 인증기술에 대한 전망을 제시한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.454-457
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• 2020

생체인증 기술의 발전으로 매년 다양한 인증 기법들이 구현되고 있으며 시장 규모가 급격히 늘어나고 있다. 현재 대부분의 IoT 환경은 생체 인식 등의 사용자 인증 기술을 활용하여 기밀성을 유지하고 있다. 하지만 인증 기술에 사용되는 센서에 인증 우회 기법 등을 통해 오류가 발생하거나 제조사의 실수 등이 포함되는 경우 인증 과정에 대한 보안 위협이 발생할 수 있다. 본 논문에서는 IoT 장비에서 이뤄지는 생체인증의 종류와 종류에 따른 인증 위협요소들을 살펴보고 다중 생체인증 방식을 접목한 대응 프로세스를 알아본다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.3
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• pp.351-358
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• 2013

In 2008, Pointcheval and Zimmer have presented multi-factor authenticated key exchange protocol with client's secret key, password, biometrics. However, it has been found to be flawed by Hao and Clarke if an attacker has single authentication factor (password), then the attacker can deduce other authentication factors. Interestingly, its countermeasure has not been presented due to the difficulty of design and structural problem. In this paper, an efficient countermeasure is briefly presented and its security is discussed as well.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.13 no.1
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• pp.27-38
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• 2003

Most password-authenticated key exchange schemes in the literature provide an authenticated key exchange between a client and a server based on a pre-shared password. With a rapid change in modem communication environments, it is necessary to construct a secure end-to-end channel between clients, which is a quite different paradigm from the existing ones. In this paper we propose a new framework which provides a password-authenticated ky exchange between clients based only on their two different Passwords without my Pre-shared secret, so called Client-to-Client Password-Authenticated Key Exchange(C2C-PAKE). Security notions and types of possible attacks are newly defined according to the new framework We prove our scheme is secure against all types of attacks considered in the paper. Two secure C2C-PAKE schemes are suggested, one in a cross-realm setting and the other in a single-sorrel setting.

• Electronics and Telecommunications Trends
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• v.29 no.4
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• pp.101-109
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• 2014

패스워드 기반의 사용자 인증은 비용이 적게 들고 편리성 때문에 보안상 취약점이 있어도 현재까지 광범위하게 사용되고 있다. 이러한 패스워드 기반 인증의 보안 취약성을 개선하기 위해 생체 인증을 사용하거나 다중 요소 인증기술을 적용하려는 시도는 그동안 계속되어 왔다. 하지만 기술에 따라 사용자의 편리성이 떨어지거나 광범위하게 설치하기에 비용부담이 증가하여 응용서비스에 적용하기에는 무리가 있었다. FIDO(Fast IDentity Online)는 인증 프로토콜과 인증수단을 분리하여 패스워드 없이 인증강도를 높이면서 사용자의 편리성도 높이려는 시도를 하는 기술로 패스워드의 문제를 극복하여 스마트 모바일 환경에 적합한 인증기술로 활용될 수 있다.

• Journal of Convergence for Information Technology
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• v.10 no.11
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• pp.40-46
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• 2020

Safe security technology is required for the startup ecosystem according to the construction and service of a joint open platform in the financial sector. Financial industry standard open API recommends that payment-related fintech companies develop/apply additional security technologies to protect core API authentication keys in the mutual authentication process. This study proposes an enhanced API security protocol using multiple channels. It was designed in consideration of the compatibility of heterogeneous platforms by further analyzing the problems and weaknesses of existing open API related research. I applied the method of concealment to remove the additional security channels into a single channel of the existing security protocols. As a result of the performance analysis, the two-way safety of the communication session of the multi-channel and the security of the man-in-the-middle attack of the enhanced authentication key were confirmed, and the computational performance of the delay time (less than 1 second) in the multi-session was confirmed.

• Journal of the Korea Society of Computer and Information
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• v.18 no.10
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• pp.71-80
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• 2013

In this paper, we analyze the security vulnerability through the several attack scenarios for the MCR-MAP(Multi-Context RFID Mutual Authentication Protocol) proposed by Ahn et al. And we propose the secure mutual authentication protocol that improved a prior MCR-MAP. The suggested protocol uses the ID of the legal tag and the timestamp generated by the server, when the tag tries to authenticate. And when the tag creates the credential, we create the new secret key computing the XOR operation between the secret key shared with the server and the tag timestamp generated by the server. As a result, the proposed protocol provides the secure mutual authentication and then is safe to spoofing attack. Also it provides forward-secrecy and then is safe to offline brute-burst attack. In this paper, we compare and verify the security vulnerability of the prior and the proposed protocol through the security analysis.