• 정보보호학회논문지
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• 제14권6호
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• pp.57-68
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• 2004

근래에, Radio Frequency Identification (RFID) 시스템은 생산, 공급망관리, 재고관리 등의 분야에서 유용하게 사용될 반한 기술로서 산업계에서 많은 관심을 받고 있다. 가까운 미래에는 저렴한 가격의 RFID 태그나 스마트 라벨이 현재 사용되고 있는 바코트 대신 상품관리에 활용될 것으로 알려져 있다. 그러나 작고 값싼 RFID태그의 생산과, 사용자 프라이버시 보호를 위한 안전한 인증프로토콜의 개발은 아직 해결해야 할 문제들이다. 반도체 기술의 발전에도 불구하고, 태그의 계산과 저장능력은 제한되어 있으므로 기존 다른 시스템에 적용되던 암호시스템의 적용은 현실적으로 쉽지 않다. 그러므로 RFID시스템에서 사용할 수 있도록 더 작은 저장 공간과 더 작은 계산량이 소요되는 새로운 프로토콜의 개발이 필요하다. 본 논문에서는 위치트래킹 공격과 스푸핑 공격에 안전한 RFID인증 프로토콜을 제안한다. 제안한 프로토콜은 기존 인증프로토콜보다 데이터베이스에서의 계산랑이 상당히 감소하였으므로 프라이버시 보호를 위한 실질적인 해결책으로 사용이 가능하다.

• 디지털산업정보학회논문지
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• 제11권1호
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• pp.59-67
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• 2015

A novel authentication mechanism is biometric authentication where users are identified by their measurable human characteristics, such as fingerprint, voiceprint, and iris scan. The technology of biometrics is becoming a popular method for engineers to design a more secure user authentication scheme. In terms of physiological and behavioral human characteristics, biometrics is used as a form of identity access management and access control, and it services to identity individuals in groups that are under surveillance. In this article, we review the biometric-based authentication protocol by Althobati et al. and provide a security analysis on the scheme. Our analysis shows that Althobati et al.'s scheme does not guarantee server-to-user authentication. The contribution of the current work is to demonstrate this by mounting threat of data integrity and bypassing the gateway node on Althobati et al.'s scheme. In addition, we analysis the security vulnerabilities of Althobati et al.'s protocol.

• 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.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권2호
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• pp.892-905
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• 2018

In smart home environment, certificate based signature technology is being studied by communication with Internet of Things(IoT) device. However, block - chain technology has attracted much attention because of the problems such as single - point error and management overhead of the trust server. Among them, Keyless Signature Infrastructure(KSI) provides integrity by configuring user authentication and global timestamp of distributed server into block chain by using hash-based one-time key. In this paper, we provide confidentiality by applying group key and key management based on multi - solution chain. In addition, we propose a smart home environment that can reduce the storage space by using Extended Merkle Tree and secure and efficient KSI-based authentication and communication with enhanced security strength.

• Journal of information and communication convergence engineering
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• 제9권5호
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• pp.562-566
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• 2011

As telecommunication technologies in telemedicine services are developed, the expeditious development of wireless and mobile networks has stimulated wide applications of mobile electronic healthcare systems. However, security is an essential system requirement since many patients have privacy concerns when it comes to releasing their personal information over the open wireless channels. Due to the invisible feature of mobile signals, hackers have easier access to hospital networks than wired network systems. This may result in several security incidents unless security protocols are well prepared. In this paper, we analyzed authentication and authorization procedures for healthcare system architecture to apply secure M-health systems in the hospital environment. From the analyses, we estimate optimal requirements as a countermeasure to its vulnerabilities.

• 한국멀티미디어학회논문지
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• 제18권12호
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• pp.1483-1491
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• 2015

Applications of Internet of Things (IoT) supply various conveniences, however unsolved security problems such as personal privacy, data manipulation cause harm to persons, even nations and an limit the applicable areas of Internet of IoT technology. Therefore, study about secure and efficient security system on IoT are required. This paper proposes ID-based remote user authentication scheme in IoT environments. Proposed scheme provides untraceability of users by using different pseudonym identities in every session and reduces the number of variables. Our proposal is secure against inside attack, smart card loss attack, user impersonation attack, server masquerading attack, online/offline password guessing attack, and so on. Therefore, this can be applied to the lightweight IoT environments.

• 인터넷정보학회논문지
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• 제9권4호
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• pp.69-77
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• 2008

X.509 인증서 확장영역에 사용자 MAC 주소를 추가함으로써 더 신뢰성 있는 사용자 인증을 제공한다. 사용자 MAC 주소를 인증서에 첨가해도 통신 퍼포먼스에 영향을 미치지 않는 것을 시연하였으며, 간단한 MAC 주소 첨가로 인해 향상된 사용자 인증을 기대한다.

• 디지털산업정보학회논문지
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• 제7권3호
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• pp.75-83
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• 2011

Cognitive radio (CR) technology is to maximize the spectrum utilization by allocating the unused spectrums to the unlicensed users. This technology enables the sharing of channels among secondary (unlicensed) and primary (licensed) users on a non-interference basis after sensing the vacant channel and as a result, it is possible to harness wireless frequency more efficiently. To enhance the accuracy of sensing, RDSS was suggested. It is a fusion mechanism based on the reputation of sensing nodes and WSPRT (weighted sequential probability ratio test). However, in RDSS, the execution number of WSPRT could increase according to the order of inputted sensing values, and the fast defense against the forged values is difficult. In this paper, we propose a transaction signing-based authentication scheme for secure distributed spectrum sensing to response the forged values. The validity of proposed scheme is provided by BAN logic.

• 전기학회논문지
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• 제60권2호
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• pp.416-422
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• 2011

Smart grid is the next generation intelligent power grid that combines the existing electric power infrastructure and information infrastructure. It can optimize the energy efficiency in both directions, suppliers and power consumers to exchange information in real time. In smart grid environments, with existing network security threats due to the smart grid characteristics, there are additional security threats. In this paper, we propose a security mechanism that provides mutual authentication and key agreement between a remote user and the device. The proposed mechanism has some advantages that provides secure mutual authentication and key agreement and secure against a replay attack and impersonation attacks.

• 정보보호학회논문지
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• 제21권1호
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• pp.187-199
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• 2011

모바일뱅킹에서 사용자인증과 거래승인을 보호하는 것은 매우 중요하다. 스마트폰에 설치된 악성 프로그램은 사용자가 입력하는 비밀을 얻어내거나 거래내용을 조작하여 사용자에게 승인하도록 유도할 수도 있다. 이 논문에서는 사용자의 비밀과 거래승인을 보호하기 위한 연구들의 보안성과 편의성을 분석하고, 이를 바탕으로 사용자의 비밀을 보호하고 문서의 내용을 조작하는 공격에 대응하는 방법을 제안한다.