• 정보처리학회논문지C
• /
• 제16C권3호
• /
• pp.325-334
• /
• 2009

본 논문에서는 기존에 제안된 RFID 인증 프로토콜이 임의의 RFID 태그로 위장한 공격자로부터 스푸핑 공격을 당할 수 있음을 증명하고, 이러한 보안 문제점을 해결한 새로운 안전하고 효율적인 RFID 상호 인증 프로토콜을 제안한다. 제안한 RFID 상호 인증 프로토콜은 기존의 RFID 인증 메커니즘들이 가지고 있는 많은 보안 문제점들을 해결할 뿐만 아니라, 스푸핑 공격에 대한 취약점을 해결하고, 태그 측에서 수행하는 연산 오버헤드를 최대한 줄여줌으로써 신뢰할 만한 인증 시간을 보장하고 전방향 안전성을 만족하는 더욱 강력한 보안성과 효율성을 제공한다.

• 디지털산업정보학회논문지
• /
• 제14권4호
• /
• pp.125-134
• /
• 2018

Lamport firstly suggested password base authentication scheme and then, similar authentication schemes have been studied. Due to the development of Internet network technology, remote user authentication using smart card has been studied. Li et al. analyzed authentication scheme of Chen et al. and then, Li et al. found out the security weakness of Chen et al.'s scheme such forward secrecy and the wrong password login problem, and proposed an a new smart card based user password authentication scheme. But Liu et al. found out that Li et al.'s scheme still had security problems such an insider attack and man-in-the-middle attack and then Liu et al. proposed an efficient and secure smart card based password authentication scheme. This paper analyzed Liu et al.'s authentication and found out that Liu et al.'s authentication has security weakness such as no perfect forward secrecy, off-line password guessing attack, smart-card loss attack, and no anonymity. And then, this paper proposed security enhanced efficient smart card based password authentication scheme using fuzzy extraction technology.

• 정보보호학회논문지
• /
• 제13권6호
• /
• pp.107-112
• /
• 2003

IEEE 802.11 네트웍에서 핸드오버는 반복되는 인증 및 키교환 절차를 요구하며, 이는 seamless 무선랜 서비스를 제공하는데 있어 큰 방해요소가 된다. 이 논문에서는 IEEE 802.11f를 이용한 빠른 키교환 및 인증 방법을 제안한다. 특히, IEEE 802.11i의 4-way 핸드쉐이크를 표준에 벗어나지 않게 수정하므로써 pre-authentication을 이용했을 때 생길 수 있는 perfect forward secrecy문제를 해결한다. 제안하는 방법은 IEEE 802.11f의 context block과 IEEE 802.11i의 핸드쉐이크만을 이용하며, 핸드오버 시에 AAA 서버와의 통신을 요구하지 않으므로써 효율성을 높였다.

• 융합보안논문지
• /
• 제22권4호
• /
• pp.179-188
• /
• 2022

패스워드 인증 체계 (PAS)는 개방형 네트워크에서 안전한 통신을 보장하는데 사용되는 가장 일반적인 메커니즘이다. 인수분해와 이산 로그 등의 수학적 기반의 암호 인증 체계가 제안되고 강력한 보안 기능을 제공하였으나, 암호를 구성하는데 필요한 계산 및 메시지 전송 비용이 높다는 단점을 가지고 있었다. Fairuz et al.은 스마트 카드 체계를 이용한 세션 키 동의와 관련하여 인수분해 및 이산 로그 문제를 기반으로 한 개선된 암호 인증 프로토콜을 제안했다. 하지만 본 논문에서는 취약성 분석을 통하여, Fairuz et al.의 프로토콜이 Privileged Insider Attack, Lack of Perfect Forward Secrecy, Lack of User Anonymity, DoS Attack, Off-line Password Guessing Attack에 관한 보안 취약점을 가지고 있다는 것을 확인하였다.

• 무역학회지
• /
• 제45권4호
• /
• pp.153-169
• /
• 2020

This study compares and analyzes the effects of GVC participation on export competitiveness in manufacturing and service industry in 36 OECD countries and 28 non-OECD countries. According to the statistical analysis result, the GVC participation had a negative impact on export competitiveness in manufacturing industry, while it had a positive impact in the service industry. In the case of the manufacturing industry, participation toward the backward GVC had a positive impact on export competitiveness before the financial crisis, besides, participation toward the forward GVC had a positive impact on export competitiveness. In the case of the service industry, export competitiveness through forward GVC participation has increased since the financial crisis has occurred, and backward GVC participation was estimated to have a negative impact on export competitiveness. The results of this study implies that, to secure export competitiveness, a converged approach of the manufacturing and service industries to upgrade the global value chain is needed.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제8권3호
• /
• pp.1144-1156
• /
• 2014

In Internet, IP multicast has been used successfully to provide an efficient, best-effort delivery service for group communication applications. However, applications such as multiparty private conference, distribution of stock market information, pay per view and other subscriber services may require secure multicast to protect integrity and confidentiality of the group traffic, and validate message authenticity. Providing secure multicast for group communication is problematic without a robust group key management. In this paper, we propose a group key management scheme based on the secret sharing technology to require each member by itself to generate the group key when receiving a rekeying message multicast by the group key distributor. The proposed scheme enforces mutual authentication between a member and the group key distributor while executing the rekeying process, and provides forward secrecy and backward secrecy properties, and resists replay attack, impersonating attack, group key disclosing attack and malicious insider attack.

• 융합보안논문지
• /
• 제16권7호
• /
• pp.121-127
• /
• 2016

최근 스마트 기기의 보급화로 Wi-Fi, LTE 등을 이용한 무선인터넷 사용률이 대폭 증가한 반면 유선인터넷의 비율은 감소하고 있는 추세이다. 이렇듯 장소에 구애받지 않고 무선인터넷에 접속하여 사람과 사람뿐만이 아니라 사람과 사물간의 통신, 사물과 사물간의 통신인 사물인터넷의 범위가 점점 다양해지고 있는 추세이다. 사물인터넷(Internet Of Thing)의 빠른 확산과 함께 사물인터넷 보안 위협에 대한 우려도 크게 늘고 있다. 본 논문에서는 사물인터넷 환경에서 그룹 통신을 위한 키 분배와 관리에 대한 새로운 기법을 제안한다. 제안 기법은 키를 분배하지 않고 그룹에 속한 사물이 자신의 비밀 정보와 공개 값을 가지고 계산한 그룹 키를 사용하여 그룹 멤버 사이에 안전한 그룹 통신이 가능하게 된다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제11권5호
• /
• pp.2646-2659
• /
• 2017

Equipped with the advantages of flexible access control and fine-grained authentication, attribute based signcryption is diffusely designed for security preservation in many scenarios. However, realizing efficient key evolution and reducing the calculation costs are two challenges which should be given full consideration in attribute based cryptosystem. In this paper, we present a key-policy attribute based signcryption scheme (KP-ABSC) with delegated computation and efficient key updating. In our scheme, an access structure is embedded into user's private key, while ciphertexts corresponds a target attribute set. Only the two are matched can a user decrypt and verify the ciphertexts. When the access privileges have to be altered or key exposure happens, the system will evolve into the next time slice to preserve the forward security. What's more, data receivers can delegate most of the de-signcryption task to data server, which can reduce the calculation on client's side. By performance analysis, our scheme is shown to be secure and more efficient, which makes it a promising method for data protection in data outsourcing systems.

• Journal of Information Processing Systems
• /
• 제7권1호
• /
• pp.111-120
• /
• 2011

The concept of Smart-Homes is becoming more and more popular. It is anticipated that Radio Frequency IDentification (RFID) technology will play a major role in such environments. We can find many previously proposed schemes that focus solely on: authentication between the RFID tags and readers, and user privacy protection from malicious readers. There has also been much talk of a very popular RFID application: a refrigerator/bookshelf that can scan and list out the details of its items on its display screen. Realizing such an application is not as straight forward as it seems to be, especially in securely deploying such RFID-based applications in a smart home environment. Therefore this paper describes some of the RFID-based applications that are applicable to smart home environments. We then identify their related privacy and security threats and security requirements and also propose a secure approach, where RFID-tagged consumer items, RFID-reader enabled appliances (e.g., refrigerators), and RFID-based applications would securely interact among one another. At the moment our approach is just a conceptual idea, but it sheds light on very important security issues related to RFID-based applications that are beneficial for consumers.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2006년도 추계학술대회 논문집
• /
• pp.786-790
• /
• 2006

Urban rail transit offers target performance and function because various lower part system such as rolling-stock, signal, power and trackis consisted as complex. In order to function properly an urban rail transit which is complicated system to work as safety and reliability, System must secure safety with structure, design, manufacture, install and verification and it is important to establish a safety standard follows it procedures, establish what step all it is important to operate. Safety standard of urban transit infrastructure is minimum standard necessary to secure safety of signal, power and track. Urban rail transit standard business leads to make many requirements. Recently, many types of equipment have applied to manage requirements and standards for system efficiently in part of universal, airline and car accordingly applied equipments use to manage a pursuit(Trace) between standard of system. Especially importance of management is emphasized more become more. Importance of standard management which usesa computing support tool recently in transit filed is embossed and is predicted to be more such forward. Therefore we propose the effective method of management with infrastructure system by constructed data-base system.