• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
• /
• 2006.06a
• /
• pp.719-722
• /
• 2006

RFID 기술은 유비쿼터스(Ubiquitous)환경에서의 핵심적인 기술로 인정받아 중요한 위치를 차지하고 있지만 RFID 태그의 정보가 쉽게 노출된다는 기본적인 특징으로 인해 사용자의 프라이버시 침해 위협이 발생할 수 있다. 따라서 현재 사용자의 프라이버시 보호에 관한 연구가 활발히 진행중에 있다. 하지만 저가의 태그에서는 연산량과 저장 공간이 제한적이기 때문에 기존방식들을 이용하기에는 많은 어려움이 있다. 본 논문에서는 저가의 태그에서 효율적으로 이용될 수 있는 RFID 인증 프로토콜을 제안하고자 한다. 우리가 제안하는 방식은 저가의 태그에서 연산량을 고려하여 XOR 연산으로만 구성되어 있다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04a
• /
• pp.229-231
• /
• 2004

휴대 단말기 보유율의 급격한 증가는 새롭고 다양한 형태의 무선 통신 기술의 개발을 촉진시키는 계기가 되었으며, 특히 국내의 경우 이동통신 시장의 경제적이나 양적으로 급속한 성장을 이루어 사회 전반에 걸쳐서 새로운 가치를 생산해 내어 생활 모습을 크게 바꾸어 놓고있다. 따라서 이러한 환경의 변화는 사용자 중심의 다양한 서비스를 제공할 수 있는 차세대 무선 통신 기술의 연구가 필요한 실정이다. 따라서 본 논문에서는 RF 태그 기반의 네트워크 형성과 더불어 유비컴퓨팅 환경에서 요구되는 서비스 생성에 따른 인증 및 동일한 서비스에 대한 관리 방식을 제안하고자 한다. 제안된 방식의 경우 RF 태그를 기반으로 이루어지는 네트워크에서 태그가 생성하는 서비스에 따라 인증 레벨을 설정하고 동일한 서비스와 인중 레벨을 갖는 서비스가 발생할 경우 이를 관리할 수 있는 그룹 아이디와 키를 생성해 관리하는 방식을 제안하고자 한다.

• Convergence Security Journal
• /
• v.6 no.1
• /
• pp.83-90
• /
• 2006

Recently, the security for RFID/USN environment is divided into network security and RFID security. The authentication protocol design for RFID security is studied to protect user privacy in RFID system. However, the study of efficient authentication protocol for RFID system is not satisfy a security for low-cost RFID tag and user privacy. Therefore, this paper proposes a secure matrix-based RFID authentication protocol that decrease communication overhead and computation. In result, the Matrix-based RFID authentication protocol is an effective authentication protocol compare with HB and $HB^+$ in traffic analysis attack and trace location attack.

• The Journal of Society for e-Business Studies
• /
• v.13 no.1
• /
• pp.21-32
• /
• 2008

RFID systems provide technologies of automatic object identification through wireless communications in invisible ranges and adaptability against various circumstances. These advantages make RFID systems to be applied in various fields of industries and individual life. However, it is difficult to use tags with distinction as tags are increasingly used in life because a tag usually stores only one object identifier in common RFID applications. In addition, RFID systems often make serious violation of privacy caused by various attacks because of their weakness of radio frequency communication. Therefore, information sharing methods among applications are necessary for expansive development of RFID systems. In this paper, we propose efficient RFID scheme. At first, we design a new RFID tag structure which supports many object identifiers of different applications in a tag and allows those applications to access them simultaneously. Secondly, we propose an authentication protocol to support the proposed tag structure. The proposed protocol is designed by considering of robustness against various attacks in low cost RFID systems. Especially, the proposed protocol is focused on efficiency of authentication procedure by considering security levels of applications. In the proposed protocol, each application goes through one of different authentication procedures according to their security levels. Finally, we prove efficiency of th proposed scheme compared with the other schemes through experiments and evaluation.

• The KIPS Transactions:PartC
• /
• v.15C no.6
• /
• pp.469-480
• /
• 2008

The recently proposed RFID(Radio Frequency Identification) authentication protocol based on a hash function can be divided into two types according to the type of information used for authentication between a reader and a tag: either a value fixed or one updated dynamically in a tag memory. In this paper, we classify the protocols into a static ID-based and a dynamic-ID based protocol and then analyze their respective strengths and weaknesses. Also, we define a new security model including forward/backward traceability, synchronization, forgery attacks. Based on the model, we analyze the previous protocols and propose a new dynamic-ID based RFID mutual authentication protocol. Our protocol provide enhanced RFID user privacy compared to previous protocols and identify a tag efficiently in terms of the operation quantity of a tag and database.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.7 no.4
• /
• pp.635-641
• /
• 2006

On the wireless-communication between Electronic Tag of RFID system and Reader, there are some existing problems with weaknesses of security such as spoofing, replay, traffic analysis, position tracking, etc., in the established hash-lock related algorithm. This paper has presented the comparison and analysis of the established hash-lock related algorithm for privacy and in order to make up for this, also suggested a new security authentication algorithm based on hash which has an authentication protocol and creates hash function by using random numbers received from the reader on real-time and every session. The algorithm suggested is able to make RFID wireless authentication system offer a several of usefulness and it has an advantage to reduce the amount of calculations compared to established algorithm. It also uses just the tags needed among a lot of tags around which are expected later and it is expected to reduce a responsibility of the server by ending unnecessary tags' action with time based.

• Journal of the Korea Society of Computer and Information
• /
• v.18 no.10
• /
• pp.71-80
• /
• 2013

In this paper, we analyze the security vulnerability through the several attack scenarios for the MCR-MAP(Multi-Context RFID Mutual Authentication Protocol) proposed by Ahn et al. And we propose the secure mutual authentication protocol that improved a prior MCR-MAP. The suggested protocol uses the ID of the legal tag and the timestamp generated by the server, when the tag tries to authenticate. And when the tag creates the credential, we create the new secret key computing the XOR operation between the secret key shared with the server and the tag timestamp generated by the server. As a result, the proposed protocol provides the secure mutual authentication and then is safe to spoofing attack. Also it provides forward-secrecy and then is safe to offline brute-burst attack. In this paper, we compare and verify the security vulnerability of the prior and the proposed protocol through the security analysis.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.19 no.5
• /
• pp.81-91
• /
• 2009

Recently, Chein et al proposed the ultralightweight strong authentication and strong integrity (SASI)protocol, where the tag requrires only simple bitwise operations. Since the tag does not support random number generator to generate a challenge nonce, an attacker can replay old messages and impersonate reader. However, all of the previous ultralightweight authentication schemes are vlunerable to various attacks: de-synk, eavesdropping, impersonating, tracking, DoS, disclosure etc. we analyze the problems of previous proposed ultrlightweight protocols, to overcome these security problems by using PRNG on the tag. Therefore, in this paper we propose a new lightweight RFID mutual authentication protocol that provides random number generator and bitwise operations, a security and an efficiency of the proposed schme analyze.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.20 no.4
• /
• pp.89-108
• /
• 2010

Recently many mutual authentication protocol for light-weight hash-based for RFID have been proposed. Most of them have assumed that communications between a backend server and reader are secure, and not considered threats for backend server and RFID reader impersonation. In the real world, however, attacks against database or reader are more effective rather than attacks against RFID tag, at least from attacker's perspective. In this paper, we assume that all communications are not secure to attackers except the physical attack, and considering realistic threats for designing a mutual authentication protocol based on hash function. And It supports a mutual authentication and can protect against the replay attack, impersonation attack, location tracking attack, and denial of service attack in the related work. We besides provide a secure and efficient RFID mutual authentication protocol which resists impersonation attacks on all of the entities and alow a backend server to search tag-related information efficiently. We conclude with analyzing the safety and efficiency among latest works.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.34 no.10C
• /
• pp.946-954
• /
• 2009

General RFID system has assumed that the communication channel between reader and back-end database is secure channel. However, the reader can be communicated with the database through insecure channel like the communication channel between the reader and the tag according to application environment. In this paper, we propose a new secure RFID mutual authentication protocol based on open network channel which assumed that all communication channels between the database, the reader and the tag are insecure communication channels. The proposed protocol uses a secure one-way hash function to provide authentication and integrity against all communication messages which exchanged on the open channels. In addition, we designed that the proposed protocol can provide forward secrecy by performing the database and the tag update their old secret key with a new secret key after finished mutual authentication.