• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.416-418
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• 2014

WAVE (Wireless Access in Vehicular Environments) 시스템 환경은 차량 간 무선통신을 가능하게 해주는 환경이다. 무선통신의 활용이 증가하면서 그에 따른 공격 방법도 증가하여, 통신 시 제3자에 의해 패킷이 변조될 수 있다. 제3자로부터 패킷을 보호하기 위해 통신 전 차량은 CA (Certificate Authority)로부터 자신이 적합한 호스트라는 것을 인증 받아야 한다. 본 논문에서는 차량과 CA의 통신 과정에서 Diffie-Hellman Key Exchange 알고리즘과 AES (Advanced Encryption Standard) 알고리즘 등을 이용하여 패킷의 기밀성과 무결성을 보장하는 프로토콜을 설계하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.05a
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• pp.1100-1103
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• 2008

VANET(Vehicle Ad-hoc Network) 환경은 도로위의 차량을 노드로 하여 구성하는 애드혹 네트워크로써 최근 들어 그 연구가 활발히 진행되고 있는 분야이다. 일반적인 애드혹 환경과 마찬가지로 VANET 환경에서도 보안적인 문제가 중요한 이슈로 대두되고 있다. VANET 환경에서 가장 중요하게 요구되는 보안요소는 차량의 익명성을 통한 위치 프라이버시와 협력 운전(cooperative driving) 단계에서 사용되는 메시지에 대한 인증, 무결성, 부인방지 등이다. 본 논문에서는 익명 아이디(pseudonym), 그룹화 등을 통해 차량의 위치 프라이버시를 제공하고 또한 이를 이용해 VANET 환경에서 사용할 수 있는 라우팅 프로토콜을 제안하고자 한다. RA(Registration Authority)에서 발급되는 익명 아이디의 집합과 차량의 전송 범위를 고려해서 구성되는 그룹화는 그룹에 속한 차량에 대해 익명성을 제공하고, 또한 그룹리더에 의해 생성되는 그룹키를 통해 효율적인 협력 운전 메시지 전달을 할 수 있게 된다. 그리고 각각의 그룹리더를 라우터로 이용해 전달되는 라우팅 프로토콜은 노드가 매우 유동적으로 움직이는 VANET 환경에서 효과적으로 메시지를 전달할 수 있도록 해줄 것이다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.5
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• pp.1087-1096
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• 2011

Vehicular Ad Hoc Network(VANET) using wireless network is offering the communications between vehicle and vehicle(V2V) or vehicle and infrastructure(V2I). VANET is being actively researched from industry field and university because of the rapid developments of the industry and vehicular automation. Information, collected from VANET, of velocity, acceleration, condition of road and environments provides various services related with safe drive to the drivers, so security over network is the inevitable factor. For the secure message authentication, a number of authentication proposals have been proposed. Among of them, a scheme, proposed by Jung, applying database search algorithm, Bloom filter, to RAISE scheme, is efficient authentication algorithm in a dense space. However, k-anonymity used for obtaining the accurate vehicular identification in the paper has a weak point. Whenever requesting the righteous identification, all hash value of messages are calculated. For this reason, as the number of car increases, a amount of hash operation increases exponentially. Moreover the paper does not provide a complete key exchange algorithm while the hand-over operation. In this paper, we use a Received Signal Strength Indicator(RSSI) based velocity and distance estimation algorithm to localize the identification and provide the secure and efficient algorithm in which the problem of hand-over algorithm is corrected.

• 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 Korea Society for Industrial Systems Conference
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• 2009.05a
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• pp.13-19
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• 2009

VANET 환경에서는 차량간 잘못된 정보의 전송이 교통 혼잡 뿐 아니라 치명적인 사고를 일으킬 수 있으므로 VANET 환경에서의 응용들이 안전하고 신뢰성 있게 제공하기 위해서는 보안성 확보가 필수적으로 요구된다. 본 논문에서는 VANET에서 안전성을 제공하기 위하여 VANET에서의 보안 위협 및 공격 유형을 분석하고 대처방안을 제시하며 제공되는 대표적인 인증 프로토콜 방식을 분석한다.

• Convergence Security Journal
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• v.12 no.1
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• pp.27-33
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• 2012

VANET(Vehicular Ad-hoc Network) is a kind of ad hoc networks consist of intelligence vehicular ad nodes, and has become a hot emerging research project in many fields. It provide traffic safety, cooperative driving and etc. but has also some security problems that can be occurred in general ad hoc networks. Also, in VANET, vehiculars sho uld be able to authenticate each other to securely communicate with network-based infrastructure, and their location s and identifiers should not be exposed from the communication messages. This paper explains V2I authentication pr otocol using a hash function that preserves the user privacy. In addition, we analyze the security stability of the V2I authentication protocol using Casper in the formal verification technique. As a result, V2I authentication protocol us ing hash function prove a stability.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.500-503
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• 2008

Vehicular Ad hoc Networks have attracted extensive attentions in recent years for their promises in improving safety and enabling other value-added services. Security and privacy are two integrated issues in the deployment of vehicular networks. Privacy-preserving authentication is a key technique in addressing these two issues. We propose a hash chain based authentication protocol that preserves the user privacy. We show that the our scheme can efficiently authenticate users. Name of Our protocol is

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.920-923
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• 2011

VANET에서 V2V, V2I 통신을 통해 다양한 서비스를 이용하기 위해서는 안전하고 신뢰성 있는 통신이 보장되어야 한다. 이를 위해 다양한 연구들이 진행되었으며, 기존 연구들 중 대칭키를 사용한 방법으로는 RAISE가 있다. RAISE는 대칭키를 기반으로 하였기 때문에 다른 연구들 보다 낮은 통신 및 연산 비용을 가진다. 하지만 메시지에 대한 인증을 즉시 제공하지 못하며, RSU가 불능이 되거나 존재하지 않는 환경에서는 차량이 서비스를 제공받지 못한다는 문제점이 있다. 본 논문에서는 이러한 문제점을 해결하기 위해 대칭키 기반의 그룹키와 식별자를 사용하여 메시지 인증을 제공하고, 메시지 인증과정에서 RSU에 비의존적인 인증 프로토콜을 제안한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.10
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• pp.2192-2198
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• 2012

VANET is a network environment which provides the communication between vehicles and between vehicle and RSU using wireless communication. VANET is very important to protect safety and life of people. Because of that, security is considered enough and certification is very important when messages exchanged between vehicles. Recently, Zhang proposed using Diffie-Hellman key exchange protocol that is method exchanging messages in VANET system through RAISE. But this is many problems on weakness from various attacks. In this paper, proposed the method that establish symmetric key using ECDH key exchange protocol and confirm safety and time spending that generate key and exchange through comparison.

• Journal of Convergence Society for SMB
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• v.4 no.1
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• pp.41-45
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• 2014

Only if the secret key stored in the engine ECU matches car key stored in the car, immobilizer system is a car anti-theft system that automobile engine takes. To take an action as soon in case of losing car key or being stolen, the ASPI protocol is proposed for assigning a new password after finishing user authentication by the smart phone etc. The shortcoming point of that directly bring the car to a service center in case of losing key can be complemented by the proposed protocol. In case of the car and key both are theft together, the car can be stopped soon.