• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.22 no.4
• /
• pp.745-759
• /
• 2012

It is shown in this paper that Yuksel-Nielson's key distribution scheme is not secure against key de-synchronization attack even though their scheme supplement ZigBee-2007 specification's security problems. Furthermore, a new key distribution scheme is proposed, which is the one to fix the security weakness of Yuksel-Nielson's scheme, as well as its security and performance analysis to verify its effectiveness.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2008.05a
• /
• pp.1151-1154
• /
• 2008

UMTS(Universal Mobile Telecommunications System)의 인증 및 키 교환 프로토콜은 기본적으로 3GPP(3 Generation Partnership Project)에서 제안한 UMTS AKA(Authentication and Key Agreement) 프로토콜을 표준으로 사용한다. 하지만 UMTS AKA 프로토콜은 네트워크 대역폭 소모, 저장 공간의 오버헤드, SQN 동기화 문제 등이 제기되고 있다. 본 논문에서는 UMTS AKA 관련 프로토콜들의 문제점을 분석하고 이를 해결하기 위한 전방향 안전성을 제공하는 F-AKA 프로토콜을 제안한다. 제안 하는 프로토콜은 상호인증을 제공하고, 프라이버시를 강화하였으며 전방향 안전성을 보장한다.

• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.30 no.4
• /
• pp.105-116
• /
• 2022

Domestic and foreign aviation industries showed steep growth along with rapid increase in aviation demand, but the industries got directly hit by COVID-19. Now, with the recovery of daily life, aviation demand is gradually increasing, too. However, the risk of aviation accidents also increases proportionally to the increasing demand for aviation. Although it is a point that safety management needs to be actively conducted to prevent safety accidents resulted from the growth of aviation industries, research on safety culture and organizations is not sufficiently done in terms of the depth and scope of it despite the importance of the discussion. Studies in various areas have reported that an organization's safety culture forms the group's safety atmosphere and then results in the workers' safety behavior. Accordingly, this study examined the effects of safety culture in an organization on the safety behavior of its members who are aircraft maintenance technicians. The results of this research can be summed up as follows: first, it has been found that the roles of the person in charge grounded on clear goals and guidelines for the organization's safety policy influence the technicians' attitudes. Second, the important factor in the technicians' safety observance is that the attitude to follow safety rules when performing aviation maintenance raises their awareness of safety, for instance, following standard operation procedures or wearing personal equipment for protection. Third, their attitudes have positive effects on safety participation, and consequently, their intention to comply with safety rules is shown as an active action to achieve the ultimate goal of safety behavior.

• Journal of the Korea Convergence Society
• /
• v.9 no.4
• /
• pp.9-14
• /
• 2018

Recently, as the internet speed is getting faster, in the cloud environment, the service receiving device is changing from a general PC to a compact device such as a mobile phone or a tablet PC. Since handheld devices such as mobile phones or tablet PCs are often used in wireless rather than wired, there are many problems that personal information may be exposed maliciously from a third party. In this paper, we propose a user privacy protection scheme through a duplicate duplicate key generation process which can safely protect user 's privacy from third party among cloud services being served through various wireless media. The proposed scheme is used to synchronize the duplicated key between the server and the intermediary device, and aims at shortening the time of the authentication process protecting the user 's privacy. In this case, the proposed scheme uses Interleave() function and random number to synchronize the server and the intermediary device, so it can safely prevent the malicious attack of the third party.

• Journal of KIISE:Information Networking
• /
• v.36 no.6
• /
• pp.552-557
• /
• 2009

One-time passwords are used just once and discarded, which makes it more secure than the repeatedly used conventional passwords. This paper proposes a challenge-response based one-time password generator on a user's mobile phone always carried with the user. The generator can provide an additional authentication for a user to issue a money transfer request within his Internet banking session on a PC. A currently used device for Internet banking generates a password that changes every 30 seconds or so, which allows a man-in-the-middle to use it for stealing money within the 30 seconds. Unlike such a device, the proposed generator resists against the man-in-the-middle attack by a novel challenge-response scheme, provides better accessability and protection against stolen devices. As the currently used devices do, it prevents any unauthorized transfer even if the victim's all other credentials are revealed through his PC infected with spyware such as a keyboard logger.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.18 no.5
• /
• pp.475-480
• /
• 2012

This study on the methode is easied to distinguish with emotional visual lighting on AtoN facility using 3colors LED, and which is controlled to on-off switching of approach light in shore or harbor. The identification have easied to provide a differentiation between the AtoN facility of red and white light and surrounding light in harbor both sides. And the integrated controller have designed to left-right and serial sequential lighting system for harbor guidance using the GPS synchronous or timer. There is expectation effect that is prevent a confusion about distinguish of facility by ship's operator and to beautify a night scene of harbor, which is expressed to emotional identification lighting and variable color lighting on AtoN body by vertical layer color lighting using LED. In addition, the performance of AtoN is implemented to display with guidance light the harbor safety message by morse code lighting. Effectiveness of system is enhanced that age and power consumption reduce by candle alternated high light LED.

• Journal of Korea Multimedia Society
• /
• v.12 no.3
• /
• pp.345-353
• /
• 2009

It is for sure that a stable game managing system is absolutely needed to accept simultaneous interfacing of many users for P2P on-line game system. The proposed P2P on-line game system in this paper is able to get smart and stable game managing taking care of extensive players through reorganizing numerous RS(Region Server) and mutual communications among RS's which can be avoid congestion on one region. Moreover, it is possible to synchronize for game nodes in time stamp utilizing Global Zone Buffer of Monitoring Server which leads to breakup loads. The system manages middleware layers in the so-called sub area, and it is able to execute no matter how big the game sizes are. That means, in some ways, we got everything we try to ensure such as the problems of high cost server and stabilization of message transmission. This paper welcomes to prove efficiency of the suggested system through the simulation.

• The KIPS Transactions:PartC
• /
• v.16C no.2
• /
• pp.189-198
• /
• 2009

Mobile RFID system is a next generation technology which combines the existing RFID systems with mobile systems. It is newly expected to provide additional services and will be broadly used in everyday life; however, it sometimes causes the privacy or security problems generated by existing RFID systems and the additional privacy or security problems. Moreover, even if many methods have been proposed to solve those problems, it is still difficult to adapt to reality or to guarantee the security perfectly. Therefore, in this paper, we propose the secure and practicable privacy protection mechanism suitable to mobile RFID systems. proposing mechanism is applicable the mechanism to Private Zone of mobile RFID systems which require to protect the privacy. This mechanism suggests that own tagging-products needed to protect privacy using mobile reader of personal don't provide any information to other readers except their own reader. In addition to, proposing mechanism is the efficient mechanism which largely reduces the process to maintain the synchronization when happen to the DoS attack or system error.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.29 no.7
• /
• pp.879-886
• /
• 2023

The purpose of this study was to verify the relationship between job calling consciousness and job enthusiasm for the development of marine police izations and individuals. A study was conducted on 136 Korea Cost Guard officials. Sub-variables of vocational calling consciousness consisted of transcendent calling, the existence of purpose and meaning, and pro-social-oriented motivation, and job enthusiasm consisted of vitality, immersion, and dedication. As a result of the verification, it was found that transcendent calling, purpose, and meaning, which are sub-variables of occupational calling recognized by Korea Cost Guard officials, have a positive (+) effect on vitality, and commitment. However, it was found that pro-social-oriented motivation did not affect vitality, commitment, and immersion. Through the analysis results, practical implications of the maritime police ization were proposed.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.18 no.1
• /
• pp.84-90
• /
• 2014

Secret communication has developed from analogue communication to digital one. Secret communication which is based on digital communication has been designed succeeding safety of one-time pad. One-time pad's safety is attributed to the security of secret key's mutual storage and mutual synchronization that is the key's interchange basis is one of the essential factors. This manuscript examines mathematical stability of BB84 algorithm which is one of the quantum cryptography system, and conducts transmission of quantum key. The created key suggests One-time Pad algorithm which interchanges ciphertext implemented AES's 64th round.