• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.4
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• pp.593-607
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• 2013

The In-Vehicle-Networking(IVN) of modern cars is constituted by an small electronic control device called ECU. In the past, there was no way to be able to access the IVN of a driving car. so IVN has been recognized as a closed environment so there is no need to exist authentication protocol between devices which are to configure the internal network and to communicate with other devices. However, constant improvements made it possible to access the IVN in many different ways as the communication technology evolves. This possibility created a need for device authentication in IVN. HB-Family are representative authentication schemes in RFID environment which has similar restrictions to IVN. In this paper, we propose an implementation method of HB-Family for device authentication between ECU considering ECU has low computing power and the message field of CAN protocol has restricted size of 8 bytes. In order to evaluate the efficiency and availability of the authentication schemes adopted our method, we have evaluated the performance based on DSP-28335 device. Further, it was possible to improve the efficiency rate of at lest 10%, up to 36%, and we then analyze this result in various aspects of the IVN.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.393-396
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• 2007

언제, 어디서나, 누구라도 컴퓨터와 네트워크를 통해 손쉽고, 편리하게 서비스를 제공 받을 수 있도록 컴퓨터를 실생활 환경 속에 편재시키는 유비쿼터스 컴퓨팅(Ubiquitous Computing)은 차세대 컴퓨팅을 주도할 개념으로 급부상하고 있다. 이러한 환경 속에서 안전하게 서비스를 이용할 수 있는 환경은 매우 중요하다. 그러나 유비쿼터스 환경을 구축하는 대부분의 센서 노드들은 초소형, 초경량의 제한된 자원을 가지고 있어, 기존의 무선 네트워크에서 사용된 기술을 그대로 사용할 수 없다. 따라서 최소한의 자원을 사용하는 보안 기술개발이 필요하다. 본 논문에서는 기존의 SHA1알고리즘을 센서 네트워크에서 사용할 수 있도록 경량화하여 적용해 보았다. 각 노드에서 센서 값을 취득하여 디지털로 변환하고 무선 통신으로 전송하기 전에 인증 알고리즘을 거쳐서 생성된 인증값을 보내려는 데이터에 추가하여 전송한다. 이 데이터를 받은 노드에서는 동일한 알고리즘으로 인증 값을 생성하고 받은 인증값과 비교하여 데이터의 인증 절차를 수행한다. 이렇게 함으로써 데이터의 정확성이나 무결성을 보장할 수 있다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.07a
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• pp.154-160
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• 2003

대리인증경로관리는 대리인증경로구축과 대리인증경로검증을 함께 지칭하는 개념이다. 휴대폰과 같이 한정된 컴퓨팅 파워를 갖는 클라이언트는 상대적으로 높은 계산능력이 요구되는 인증경로관리기능을 스스로 처리하지 않고 서버로 위임하여 경량화된 클라이언트를 지향할 수 있다. 본 논문에서는 대리인증경로관리 프로토콜의 하나인 SCVP에 대해 RFC 3379에서 정의한 대리인증경로관리 프로토콜 평가기준을 적용하여 그 적합성 여부를 살펴본다. 아울러 개선된 SCVP를 제안하여 평가기준을 만족하지 않는 사항을 보완하는 동시에 프로토콜의 안전성과 확장성을 증대하고자 한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.19 no.2
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• pp.105-115
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• 2009

At the most recent, IPTV service is increasing, which isa communicative broadcasting fusion service that provides various multimedia contents interactively followed by user's request through super high-speed internet. For IPTV user service with high mobility, IPTV user's enrollment is essential. However, IPTV service provided to mobile users can't provide the certification of mobile user securely. This paper proposes light user certification protocol which can certificate mobile users by attaching RFID to IPTV STB for secure awareness of mobile users who get IPTV service. The proposed protocol prevent reply attack and man-in-the-middle attack from happening oftenin a wireless section by transmitting the result value hashed by hash function with both its' ID and random number received from tag after tag transmits random number which generated randomly in the process of certification of mobile user to IPTV STB.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.584-586
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• 2017

In this paper we provide a unified crypto core that integrates lightweight symmetric cryptography and authentication. The crypto core implements a unified 128 bit key architecture of PRESENT encryption algorithm and a new lightweight encryption algorithm. The crypto core also consist of an authentication unit which neglects the use of hashing algorithms. Four algorithms are used for authentication which come from the Hopper-Blum (HB) and Hopper-Blum-Munilla-Penado (HB-MP) family of lightweight authentication algorithms: HB, HB+, HB-MP and HB-MP+. A unified architecture of these algorithms is implemented in this paper. The unified cryptosystem is designed using Verilog HDL, simulated with Modelsim SE and synthesized with Xilinx Design Suite 14.3. The crypto core synthesized to 1130 slices at 189Mhz frequency on Spartan6 FPGA device.

• Journal of IKEEE
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• v.24 no.4
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• pp.931-941
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• 2020

As natural language processing technology using machine learning develops, a Smart Home Network Service (SHNS) is drawing attention again. However, it is difficult to apply a standardized authentication scheme for SHNS because of the diversity of components and the variability of users. Blockchain is proposed for data authentication in a distributed environment. But there is a limit to applying it to SHNS due to the computational overhead required when implementing a proof-of-work system. In this paper, a lightweight work proof system is proposed. The proposed lightweight proof-of-work system is proposed to manage block generation by controlling the work authority of the device. In addition, this paper proposes an access control scheme for SHNS.

• Proceedings of the KAIS Fall Conference
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• 2011.12b
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• pp.581-583
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• 2011

본 논문에서는 스마트워크 환경에 적합한 인증 방법으로써, QR code를 이용하여 사전에 이동통신사로부터 인증 받은 단말을 이용하여 비 인가된 장비를 통해 접근을 하는 사용자를 인증할 수 있도록 하였다. 이를 위해, 기존의 사용자 인증 시스템보다 안전하고 복잡하지 않은 연산처리를 통해 상호간의 인증이 가능한 경량화 된 프로토콜을 설계하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.480-482
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• 2017

최근 무선 통신 기술과 센서 디바이스들의 발달로 센서 기반 IoT 환경이 다양한 분야에 활용되고 있다. 하지만, 센서 네트워크 환경을 구성하는 센서 노드는 대부분 소형 하드웨어로 구성되어 있어 메모리, 처리능력, 에너지 등에서 많은 제약사항을 가지고 있다. 또한, 이기종 센서간의 통신 절차도 필요하다. 따라서, 본 논문에서는 DisTance-Bounding 프로토콜과 해시 함수를 이용하여 센서 노드간 인증 및 키 교환을 경량화 기법을 제안한다. 제안하는 시스템은 숲이나 군사지역 등 사람이 접근하기 어려운 곳에 활용되는 센서 노드들의 배터리 수명을 향상시켜 효율적이고 지속적인 데이터 수집이 가능할 것으로 기대된다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.18 no.3
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• pp.84-91
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• 2010

New aircraft category such as Light Sport Aircraft is introduced to prevent Ultralight Vehicle accidents and to promote aviation sports. Therefore, a new rule for airworthiness standard, certification, operation and maintenance of light sport aircraft is being created. The present study deals with LSA concept, development trend of LSA, airworthiness standards and certification policy. In particular, an aircraft type analysis of FAA certified LSA is conducted to establish performance requirements of Light Sport Aircraft designs.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.21 no.1
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• pp.57-61
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• 2013

In the present study, which is currently operating domestically and internationally, from the Technical Standards for Flight Safety of Light Sport Aircraft and certification system through a comparative analysis of the LSA Category Airworthiness Certifications documents. In particular, an aircraft type analysis of FAA certified S-LSA that the speed greater than 120 knots LSA manufactured without United States of America. Through the analysis, we presented a revised plan to activation of the domestic aviation leisure sports and the development of the Light Sport Aircraft industry in reality.