• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.824-825
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• 2010

최근 RFID 태그들이 근접 인증(proximity authentication)을 위해 사용자의 위치나 상황을 이용하여 통신하기 때문에 위치 기반 공격인 중계 공격(relay attack)에 매우 취약함이 증명되었다. 이러한 중계 공격들을 방지하기 위해 리더와 태그사이의 메시지 송수신 왕복 시간을 측정하는 경계 결정(distance-bounding) 프로토콜이 한 해결책으로 연구되고 있다. 2008년에 Munilla와 Peinado는 Hancke-Kuhn이 제안한 프로토콜을 수정하여 보이드(void) 기법을 적용한 RFID 경계 결정 프로토콜을 제안하였다. 공격자에게 n번의 왕복에서 $(5/8)^n$으로 성공 확률을 감소시켰지만, 저비용 수동형 태그에서 많은 통신량과 저장 공간을 요구하므로 비효율적이다. 따라서 본 논문에서는 태그측의 해쉬 함수 연산량을 줄이고, 적은 저장 공간을 요구함으로써 저비용 RFID 시스템에 적합한 효율적인 RFID 경계 결정 프로토콜을 제안한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.12
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• pp.831-841
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• 2014

The attacker can access the RFID systems illegally because authentication operation on the RFID systems are performed in wireless communication. Authentication methods based on the PUF were presented to defend attacks. Because of Hash and AES, the cost is expensive for the low-cost RFID tag. In this paper, the PUF-based encryption processor and the mutual authentication protocol are proposed for low-cost RFID authentication. The challenge-response pairs (PUF's input and output) are utilized as the authentication key and encrypted by the PUF's characteristics. The encryption method is changed each session and XOR operation with random number is utilized. Therefore, it is difficult for the attacker to analyze challenge-response pairs and attack the systems. In addition, the proposed method with PUF is strong against physical attacks. And the method protects the tag cloning attack by physical attacks because there is no authentication data in the tag. Proposed processor is implemented at low cost with small footprint and low power.

• The KIPS Transactions:PartC
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• v.13C no.5 s.108
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• pp.595-600
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• 2006

Nowadays, low-cost radio frequency identification (RFID) technique, is recognizable without the physical contact between the reader and the tag, has been attracting more and more interests from both industry and academic institutes. however, it causes the serious privacy infringement such as excessive information exposure and user's location information tracking due to the wireless characteristics. The security problem of read only tag can be only solved by physical method. In this paper, we propose a low-cost authentication protocol which can be adopted for read-only RFID tag using XOR and Partial ID. The proposed protocol is secure against reply attacking, eavesdropping and spoofing attacking so that avoiding the location privacy exposure

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.7C
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• pp.755-761
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• 2006

Previous RFID technique, it is recognizable without the physical contact between the reader and the tag, causes the serious privacy infringement such as excessive information exposure and user's location information tracking due to the wireless characteristics. Especially the information security problem of read only tag is solved by physical method. In this paper, we propose a low-cost mutual authentication protocol which is adopted to read-only tag and secure to several attacks using XOR and Partial ID. The proposed protocol is secure against reply attacking, eavesdropping, spoofing attacking and location tracking.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.1B
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• pp.17-26
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• 2005

RFID(Radio Frequency IDentification) is a technology that automatically identifies objects attached with electronic tags by using radio wave. For the implementation of an RFID system, an anti-collision algorithm is required to identify several tags within the RFID reader's range. Few researches report the performance trade-off among anti-collision algorithms in terms of the communications traffic between the reader and tags, the identification speed, and so on. In this paper, we analyze both tree based memoryless algorithms and slot aloha based algorithms that comprise of almost every class of existing anti-collision algorithms. To compare the performance, we evaluated each class of anti-collision algorithms with respect to low-cost RFID system with 96-bit EPC(Electronic Product Code). The results show that the collision tracking tree algorithm outperforms current tree based and aloha based algorithms by at least 2 times to 50 times.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.681-682
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• 2011

RFID technique has been applied in high-security and high-integrity settings such as national defense, healthcare, and citizen identification. We proposed especially the privacy of sensitive data, various cryptographic techniques applicable to low-cost RFIDs in order to enhance the security of RFID.

• Convergence Security Journal
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• v.7 no.1
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• pp.55-62
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• 2007

In ubiquitous environment the authentication protocol design for RFID security is studied to protect user privacy in RFID system. The XOR-based approach of RFID security is implemented inexpensively and simply. However because of using same security informations, ones of tag is disclosed easily. In this paper, we enhance the previous XOR-based authentication protocol using a circular shift operation.

• The KIPS Transactions:PartC
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• v.16C no.3
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• pp.325-334
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• 2009

This paper demonstrates that an attacker can impersonate a random RFID tag and then perform the spoofing attack in the previous RFID authentication protocol. To resolve such a security problem, we also propose a new secure and efficient RFID mutual authentication protocol. The proposed RFID mutual authentication protocol is not only to resolve many security problems with the existing RFID authentication mechanism and the vulnerability against spoofing attack, but also to guarantee reliable authentication time as reducing computational overhead performing by tag. As a result, the proposed RFID mutual authentication protocol provides stronger security including the forward secrecy and more efficiency.

• Journal of Korea Society of Industrial Information Systems
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• v.26 no.1
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• pp.31-40
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• 2021

The important goal of the unmanned vehicle technology is on controlling the direction and speed of the vehicle with information acquired from various sensors, without the intervention of the driver, until the vehicle reaches to its destination. In this paper, our focus is on developing an unmanned conveyance system by exploiting low-cost sensing technology for indoor factories or warehouses, where the moving range of the vehicle is limited. To this end, we propose an architecture of a scalable automated conveyance system. Our proposed system includes a number of unmanned conveyance vehicles, and the efficient control mechanism of the vehicles without neither conflicts nor deadlock between the vehicles being simultaneously moved. By implementing the real prototype of the system, we successfully verify the efficiency and functionality of the proposed system.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.18 no.2
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• pp.117-128
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• 2008

Compared with the existing bar code system, RFID system has lots of advantages such as it identifies automatically massive objects. We might anticipate RFID technology will be a substitution for an optical bar code system in the near future. However, their feature that uses radio waves may cause various security problems. Many kinds of solutions have been researched to overcome these security problems. In this paper, we analyze the previous proposed protocols. And then, we categorize RFID authentication into two types according to the synchronization requirement between a Back-end Database and a Tag. In addition, we introduce the previous proposed approaches to tag search problem in RFID authentication. And we propose an efficient method which provides fast tag search by using membership test algorithm, a Bloom filter.