• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권10호
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• pp.2844-2861
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• 2023

Internet is the most prevailing word being used nowadays. Over the years, people are becoming more dependent on the internet as it makes their job easier. This became a part of everyone's life as a means of communication in almost every area like financial transactions, education, and personal-health operations. A lot of data is being converted to digital and made online. Many researchers have proposed different authentication factors - biometric and/or non-biometric authentication factors - as the first line of defense to secure online data. Among all those factors, passwords and passphrases are being used by many users around the world. However, the usability of these factors is low. Also, the passwords are easily susceptible to brute force and dictionary attacks. This paper proposes the generation of a novel passcode from the hybrid authentication factor - sound. The proposed passcode is evaluated for its strength to resist brute-force and dictionary attacks using the Shannon entropy and Passcode (or password) entropy formulae. Also, the passcode is evaluated for its usability. The entropy value of the proposed is 658.2. This is higher than that of other authentication factors. Like, for a 6-digit pin - the entropy value was 13.2, 101.4 for Password with Passphrase combined with Keystroke dynamics and 193 for fingerprint, and 30 for voice biometrics. The proposed novel passcode is far much better than other authentication factors when compared with their corresponding strength and usability values.

• 한국콘텐츠학회논문지
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• 제20권9호
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• pp.389-396
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• 2020

전자인증은 정보시스템을 통해 이루어지는 본인 확인 기능으로 전자거래를 위한 핵심 기능 중 하나이다. 공인인증서 의무 사용이 폐지되면서 다양한 사설 전자인증 서비스가 등장하고 있으며, 전자인증 외에 다양한 부가서비스를 제공하는 방향으로 발전하고 있다. 본 연구에서는 전자인증 서비스에 대한 사용자 만족에 영향을 미치는 요인을 탐색하고, 탐색한 요인들 간의 상대적인 영향력을 비교하여, 전자인증 서비스의 경쟁력 강화에 기여할 수 있는 시사점을 도출하였다. 전자인증 서비스의 특성들에 근거하여 탐색한 결과, 가용성, 편리성, 부가성, 보안성 등 4개의 요인을 발견하였고, 이들 4개의 요인들과 사용자 만족도 간의 인과관계를 분석하기 위한 연구모형을 수립하고 분석하였다. 분석 결과에 의하면, 가용성, 편리성, 보안성은 사용자 만족도에 유의미한 영향을 미치나, 부가성은 유의미한 영향을 미치지 않는 것으로 나타났다. 또한, 가용성과 편리성에 비해 보안성은 사용자 만족도에 매우 강한 영향을 주는 것을 확인할 수 있었다. 본 연구결과는 전자인증 서비스 사업자는 보안성을 제고하면서 사용자에게 부가서비스의 유용함을 인식시키는 노력을 해야 함을 시사한다.

• 한국멀티미디어학회논문지
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• 제25권7호
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• pp.932-944
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• 2022

Smartphones, are currently equipped with high-performance hardware to process large amounts of data and provide most of the functions provided by desktop PCs. In addition, the smartphones enable quick user authentication through biometric information collected from embedded sensors. However, the biometric authentication method is sometimes rejected due to social and cultural environment, security vulnerabilities, and misrecognition rate. Thus, conventional authentication methods such as PIN and pattern authentication are still mainly used. Consider the latest foldable and bendable smartphones. These devices may be vulnerable to social engineering attacks as they use conventional authentication methods without considering their form factors. In this study, therefore, we propose an authentication method using partial elements of PIN and pattern authentication as a way to increase the security of the conventional authentication methods and consider the recent form factors. According to the performance evaluation results, our method provides improved safety compared to the conventional methods.

• 한국정보통신학회논문지
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• 제22권1호
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• pp.75-82
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• 2018

모바일 기기 사용자가 증가함에 따라서 다양한 사용자 인증 방식에 대한 연구가 활발하게 진행되고 있다. 사용자 인증방식에는 사용자 아이디와 비밀번호를 이용하는 지식기반 인증방식, 사용자만이 가지고 있는 특성인 생체기반, 위치기반 등을 이용하는 방법과 OTP(On Time Password)와 같은 2차 인증을 진행하는 인증방식이 사용되고 있다. 본 논문에서는 기존 인증방식의 문제점을 개선하고 사용자가 원하는 방식으로 암호화가 진행될 수 있는 사용자 시스템을 제안한다. 제안한 인증 시스템은 모바일 기기를 이용하여 인증요소를 수집하는 인증요소 수집 모듈, 수집한 인증요소를 조합하여 보안키를 생성하는 보안키 생성 모듈, 생성된 보안키를 이용하여 인증을 진행하는 암호화 및 복호화 모듈로 구성된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권1호
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• pp.511-535
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• 2017

Internet banking is one of many services provided by financial institutions that have become very popular with an increasing trend. Due to the increased amount of usage of the service, Internet banking has become a target from adversaries. One of the points that are at risk of an attack is the login process. Therefore, it is necessary to have a security mechanism that can reduce this risk. This research designs and develops a multi-factor authentication protocol, starting from a registration system, which generates authentication factors, to an actual authentication mechanism. These factors can be categorised into two groups: short term and long term. For the authentication protocol, only three messages need to be exchanged between a client and a financial institution's server. Many cryptographic processes are incorporated into the protocol, such as symmetric and asymmetric cryptography, a symmetric key generation process, a method for generating and verifying digital signatures. All of the authentication messages have been proved and analysed by the logic of GNY and the criteria of OWASP-AT-009. Even though there are additional factors of authentication, users do not really feel any extra load on their part, as shown by the satisfactory survey.

• 디지털융복합연구
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• 제12권2호
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• pp.549-554
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• 2014

IT와 융합한 지능형 자동차에 대한 연구가 현재 활발히 진행중이다. 안전한 지능형 자동차 서비스를 위해 다양한 통신 기술이 제공이 되고 있다. 지능형 자동차가 통신기술을 이용한 서비스가 제공되면서 다양한 보안위협 요소가 도출되고 있다. 지능형 자동차에서 보안 인증 솔루션을 위해서는 소유권, 지식, 생체정보를 포함하고 있어야 한다. 본 논문에서는 지능형 자동차의 보안위협 요소를 분석하고 지능형 자동차의 보안 솔루션인 생체정보를 이용한 인증 기법을 제공한다. 기존의 지능형 자동차 인증보안 솔루션보다 높은 보안성을 갖는 구현의 문제점이 해결되도록 사용자 생체인증기법을 제안한다.

• 한국정보시스템학회지:정보시스템연구
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• 제27권2호
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• pp.53-75
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• 2018

Purpose The purpose of this study is to provide implications by examining the factors affecting the consumers' innovation resistance and intention to use FIDO technology based on the innovation resistance model. In addition, we investigate the difference between FIDO group using biometric authentication technology and those using knowledge / possessive authentication technology. Design/methodology/approach This study investigated the factors influencing innovation resistance and intention to use based on the innovation resistance model. And the structural equation model was applied to analyze the effect of innovation resistance and intention to use. Findings According to empirical results, this study found that perceived relative advantage (+), perceived risk (+), perceived complexity (+), and existing product attitude(+) influenced innovation resistance, and perceived relative advantage (+), self efficacy(+), and innovation resistance(-) influenced intention to use. In addition, this study found that there is a significant difference between the group using the bio-based authentication technology and the group using the knowledge / possessive based authentication technology.

• Journal of Information Technology Applications and Management
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• 제27권2호
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• pp.1-21
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• 2020

The purpose of this study is to investigate the behavioral factors affecting the security attitude and intention to use biometrics password based on the protection motivation theory. This study also investigates security awareness training to understand trust, privacy, and security vulnerability regarding biometric authentication password. This empirical analysis reveals security awareness training boosts the protection motivational factors that affect on the behavior and intention of using biometric authentication passwords. This study also indicates that biometric authentication passwords can be used when the overall belief in a biometric system is present. After all, security awareness training enhances the belief of biometric passwords and increase the motivation to protect security threats. The study will provide insights into protecting security vulnerability with security awareness training.

• 전기학회논문지
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• 제65권12호
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• pp.2167-2176
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• 2016

In the multi-server environment, remote user authentication has a very critical issue because it provides the authorization that enables users to access their resource or services. For this reason, numerous remote user authentication schemes have been proposed over recent years. Recently, Lin et al. have shown that the weaknesses of Baruah et al.'s three factors user authentication scheme for multi-server environment, and proposed an enhanced biometric-based remote user authentication scheme. They claimed that their scheme has many security features and can resist various well-known attacks; however, we found that Lin et al.'s scheme is still insecure. In this paper, we demonstrate that Lin et al.'s scheme is vulnerable against the outsider attack and user impersonation attack, and propose a new biometric-based scheme for authentication and key agreement that can be used in the multi-server environment. Lastly, we show that the proposed scheme is more secure and can support the security properties.

• 한국컴퓨터정보학회논문지
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• 제17권12호
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• pp.159-167
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• 2012

공개키 기반(public key infrastructure)의 인증체계는 서비스 제공자와 사용자 모두에게 인증성과 보안성, 접근성, 경제성, 편의성을 제공으로 국내의 공공 및 민간 기업들은 웹 서비스의 인증방안으로 널리 사용되고 있다. 그러나 공개키 기반의 인증체계의 사용에 따른 여러 보안 취약 요인들이 나타나면서, 클라이언트 시스템의 안전성은 위협을 받고 있다. 따라서 본 논문은 공개키를 기반으로 하는 인증체계에 따른 취약 요인들을 사례연구 및 실험을 통해 분석함으로써, 향후 새로운 인증체계의 구축 및 성능향상을 위한 자료로 활용될 것으로 기대한다.