SUCV를 개선한 MIPv6 바인딩 갱신 프로토콜

원유석,조경산,Won You-Seuk,Cho Kyung-San 한국정보처리학회 2006 정보처리학회논문지 C : 정보통신,정보보안 Vol.13 No.3

The process of binding update for the routing optimization in MIPv6 can make the involved MN (Mobile Node) and CN(Correspondent Node) vulnerable to various attacks. Therefore, securing binding update process becomes an important research issue in the MIPv6, and several secure binding update protocols have been proposed. In this paper, we compare several existing binding update protocols, and analyze the vulnerability of MNs and CNs to the possible attacks and the management overhead of the SUCV(Statistic Uniqueness and Cryptographic Verifiability) which is considered to be superior to other protocols. Then, we propose an advanced protocol to resolve above drawbacks. Through the detailed analysis, we show that our protocol can reduce the computational overhead of MN, enable better management, and achieve a higher level of security against the redirect attacks, DoS(Denial of Service) attacks and brute force attacks, compared to SUCV. MIPv6에서 경로 최적화를 제공하기 위한 바인딩 갱신은 다양한 공격에 취약할 수 있다. 따라서, 안전한 바인딩 갱신이 MIPv6의 중요한 연구 과제가 되었으며, 이를 위한 여러 프로토콜들이 제안되었다. 본 연구에서는 기존의 여러 바인딩 갱신 프로토콜들의 특성을 비교 분석하고, 그 중에서 보안성 및 성능에서 우수한 평가를 받는 SUCV 프로토콜에 대한 공격 취약점과 관리의 문제점을 제시하고, 이를 해결할 수 있는 개선된 바인딩 갱신 프로토콜을 제안한다. 또한, 상세한 분석을 통해 제안 프로토콜이 SUCV 프로토콜이 갖는 redirect 공격, DoS 공격 및 brute force 공격에 대한 취약성과 관리적 문제점을 개선하고 MN의 연산 부하를 감소시킴을 제시한다.

호텔 이미지가 고객 선호도에 미치는 영향에 관한 연구:호텔식 음료 업장 이용객을 중심으로

원유석 한국외식경영학회 2007 외식경영연구 Vol.10 No.2

This study focuses on the marketing strategy for hotel’s continual brand management analysing the influence of hotel image on consumer preferences. A model and hypothesis are made on the basis of the existing study, theory and preceding study on hotel image and consumer preferences. the influence of satisfaction at the property of hotel image show that the functional image of hotel brand is effected by access to hotel, quality of service, quality and variety of facilities, safety of hotel image property. And social image of hotel brand is effected by reasonal price, quality of service, external appearance, safety, reputation. lastly, the influence of hotel brand image on consumer preferences show that intention to reuse and frequency of return are effected by functional, emotional and general image of hotel brand. And the intention to transmit by positive word of mouth and good impression of consumer preferences are effected by functional, social, emotional and general image of hotel brand. Especially, the functional image of hotel brand has an extreme effect on intention to reuse and transmit by positive word of mouth, good impression.

호텔레스토랑 서비스 대기상황 요인이 지각된 대기시간 및 서비스품질, 고객만족에 미치는 영향에 관한 연구 -5성급 관광호텔레스토랑 이용자를 대상으로-

원유석 한국호텔리조트학회 2019 호텔리조트연구 Vol.18 No.3

The purpose of this study is to analyze the relationship between waiting factors, latency, service quality and customer satisfaction. The results of this study are as follows. It is shown that the waiting time factor has a negative effect on the perceived waiting time and the perceived waiting time has a negative effect on the service quality. In the regression analysis of service quality and customer satisfaction, it is confirmed that there is a positive relationship. In this study, the atmospheric factors influencing the perceived waiting time in the hotel restaurant were verified to be significant by all factors except "Unknown waits". In other words, it was confirmed that the customer can reduce the perceived waiting time through the unfair atmosphere, uncomfortable atmosphere, unexplained atmosphere management which is a factor that can be directly controlled at the hotel restaurant. Through the management of these factors, Quality, and customer satisfaction as a result.

MIPv6의 안전한 바인딩 갱신을 위한 프로토콜 비교 분석

원유석,조경산,Won, You-Seuk,Cho, Kyung-San 한국정보처리학회 2003 정보처리학회논문지 C : 정보통신,정보보안 Vol.10 No.6

MIPv6에서는 경로 최적화를 위하여, 새로운 서브넷으로 이동한 MN(Mobile Node) 은 CN(Correspondent Node) 에게 자신의 HoA(Home Address) 와 새로운 CoA(Care-of Address)와의 바인딩을 통고하는 바인딩 갱신 패킷을 전송해야 한다. 하지만, 안전하지 않은 바인딩 갱신은 오히려 침입자로 하여금 다양한 공격을 가능하게 한다. 이에 따라 안전한 바인딩 갱신을 ?∏? 여러 프로토콜들이 제안되었다. 본 연구에서는 기존 프로토콜들을 비교하기 위해 공격에 대한 취약성을 포함한 보안 특성, 프로토콜의 관리 특성, 패킷 교환 횟수와 암호화 연산 시간의 성능 특성에 대한 비교 기준을 제시하였다. 또한, 제시된 기준에 따라 대표적인 4가지 바인딩 갱신 프로토콜들을 비교 분석하고, 안전한 바인딩 갱신을 위한 개선안을 제시하였다. For the route optimization in the MIPv6, MN(Mobile Node) sends CN(Correspondent Node) a binding update message to notify the binding of is HoA(Home Address) with its new CoA(Care-of Address). However, unautenticated binding updates expose the involved MN and CM to various sucurity attacks. Thus, protecting the binding update process becomes of paramount importance in the MIPv6, and several secure binding update protocols, and the performance of packet exchanges and cryptographic operations. Then, we analyze the four typical binding update protocols based on the presented criterions. In addition, we propose some improvement tips for secure binding updates.

서비스 회복 패러독스에 영향을 미치는 조절 인자에 관한 연구 - 결과상, 절차상의 서비스 실패, 과거 거래량에 따라서

원유석 한국문화관광학회 2005 문화관광연구 Vol.7 No.1

호텔종사원의 권한부여와 조직몰입이 조직효율성에 미치는 영향에 관한 연구

원유석 한국고객만족경영학회 2007 고객만족경영연구 Vol.9 No.1

본 연구에서는 호텔 종사원을 권한부여 시킴으로서 종사원의 역량과 능력을 개발하고 조직몰입을 가져와 직무성과를 증대시켜 호텔기업의 경영성과 향상에 도움이 될 수 있는 시사점을 제시하는 것이다. 선행연구를 토대로 권한부여는 의미성, 영향력, 역량, 자기결정성 등 4개 요인으로 구분하였으며, 조직몰입은 정서적, 계속적, 규범적으로 분류하여 이러한 변수들이 직무성과와 이직의도에 어떠한 영향을 미치는 지를 규명하고자하였다. 연구 결과 호텔기업에서 종사원의 권한부여는 조직몰입, 직무성과, 이직의도에 영향을 미치는 것으로 분석되었다. 권한부여의 하위요소 의미성, 영향력, 역량, 자기결정성은 권한부여 개념이 권한의 위임이나 부여의 범위를 넘어서 종사원 자신의 역량과 능력을 증대하여 이를 조직전체에 확산하여 궁극적으로 조직성과를 높이는 동기부여적 개념도 포함하고 있다는 점을 고려해야 한다. 권한부여의 하위요소인 의미성이 조직몰입과 직무성과에 많은 영향을 주고 있다는 점은 시사하는 바가 크다. This study is to examine how empowerment and organizational commitment influence organizational effectiveness, and what interaction exists among empowerment, organizational commitment, organizational effectiveness. The results of this investigation are as follows: First, empowerment has a significant effect on organizational commitment. Second, organizational commitment has a significant effect on organizational effectiveness. organizational commitment has influence on job performance and turnover intention. Third, empowerment has a significant effect on organizational effectiveness. The results of this study have shown the influence of empowerment and organizational commitment on the organizational effectiveness. This study suggest the empowered employees will have a high degree of self-confidence and self-efficacy, which consequently will lead to organizational commitment and organizational effectiveness such as job performance and turnover intention.

호텔식음료서비스 종사원의 감정심리가 직무태도에 미치는 영향분석

원유석 (사)한국관광레저학회 2018 관광레저연구 Vol.30 No.12

The purpose of this study is to investigate the relationship between job attitudes (job involvement, service orientation) that can occur as a result of utilization ability of emotional psychology (emotion regulation, emotional application) of hotel food & beverage service employees including service industry, The results of this study are as follows. Emotional adjustment and emotional application of hotel food & beverage service employees showed positive influence on job commitment and service orientation. This implies that the higher the employee's level of emotional hearing, the better service quality can be provided. Especially, it means that the qualities that control and apply the emotion well have a more positive attitude of work commitment and that the employees who understand the emotional psychology of the customer fulfill the service work themselves more for the customer service. Since excellent job attitude gives satisfaction to customers and this feeling of satisfaction is directly related to profit improvement as well as improvement of image of hotel company, hotel service company evaluates the level of emotional level of individual applicant continuous attention should be paid to establishing measures to improve and sustain the level of emotional hearing at the same time as presenting the indicators.

서비스 실패의 심각도, 과거 서비스 실패 경험의 여부가 서비스 회복 패러독스에 미치는 영향에 관한 연구

원유석 한국고객만족경영학회 2005 고객만족경영연구 Vol.7 No.1

본 연구에서는 서비스 회복의 조절 요인과 그 요인들 간의 상호작용을 분석할 수 있는 시나리오를 설정하여, 서비스 회복이 고객 만족에 미치는 영향을 고찰하였다. 본 연구의 가장 중요한 결론은, 합당한 조건하에서, 우수한 실패 회복은 고객을 진정시킬 수 있을 뿐 아니라 고객 만족도를 실패 이전 수준보다 더 높일 수 있다는 것이다. 다시 말해서 회복 패러독스 이론은 아주 타당성 있는 이론이라는 것이다. 하지만 실패 이후에 역설적으로 나타나는 만족도 증가는 수많은 상황 변수에 의해 영향을 받는다. 그러므로 연구자들은 회복 패러독스의 연구에 있어서는 보다 섬세한 분석적 접근 방법을 취해야 한다. 즉, 패러독스의 존재를 입증하거나 또는 그에 반하는 증거를 제시하는 것보다는, 서비스 실패와 최고 수준의 교정 후에 패러독스 만족이 발생할 가능성을 높이거나, 혹은 방해할 수 있는 개입 요인과 그 요인들 간의 상호작용을 분석하는 방법으로 본 주제에 접근하도록 해야 한다. 이러한 접근법을 제안하는 이유는 본 연구에서, 실패 후의 고객 만족도는 상황 변수(Contextual Variables)에 의해 영향을 받는 다는 것을 지적하고 있기 때문이다. This dissertation theoretically and empirically examines factors which moderate the occurrence of a "recovery paradox" in the event of a service failure. The research findings indicate that, under appropriate conditions, a customer can experience a paradoxical satisfaction increase after a service failure. One such condition entails the severity of the failure. That is, results indicate that it is unlikely that a first-rate redress initiative can return the satisfaction of a service failure recipient to par. The findings of this investigation also reveal that a customer who has experienced a prior failure with the firm is less likely to be impressed by a superb recovery than a customer who has never encountered a problem with the service provider.

엘크사슴의 냉동정액 생산과 인공수정

원유석,이성수,박노형,김덕임,정지원,이봉식,김찬규 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.5

To establish the system for frozen-semen production, oestrus synchronization, and artificial insemination (AI) in Elk deer, the characteristics of frozen-semen and conception rate by artificial insemination were observed. Semen were collected from 2 heads of elk (Cervus Elaphus canadensis) sire by an electroejaculator and diluted to 0.9- 1.1 X 10^9 sperms/straw with the extender containing glycerol, hydroxymethyl amino methane, citric acid, fructose, and 20% egg yolk. The diluted semen were chilled at 4℃ for 3-4 hours, prefrozen at -140㎏ for 30-40 minutes, and preserved at liquid nitrogen (-196℃). The motility, viability, and abnormality of frozen-thawed semen were 62.4-70.5%, 73.7-75.3% and 6.8-7.3%, respectively. Oestrus was synchronized in 48 heads of hind with progesterone- impregnated intravaginal devices (CIDRs). The CIDRs were removed on Day 14, and 10-250 IU pregnant mare's serum gonadotrophin (PMSG) were given to each hind. Oestrus exhibition rate was 95.8% (46/48). Forty-six hinds, showing oestrus, were artificially inseminated with frozen-thawed semen 60-62 hours after PMSG injection. Pregnancy was detected by ultrasonography at 40 days after Al. The overall conception rate was 78.3% (36/46). These results indicate that the system for frozen-semen production and AI established in this study may be adapted to deer industry.

Albumin 밀도 경사를 이용한 정자분리가 정자운동특성 및 수태율에 미치는 영향

원유석,이성수,박노형,김덕임 한국축산학회 1999 한국축산학회지 Vol.41 No.5

The 16 ejaculates from 3 Hanwoo sires were used to study whether the sperm separation by 6, 8 and 10% of bovine serum albumin (BSA) gradients increase the motional characteristics relating sperm fertility and pregnancy rate in Hanwoo. The motional characteristics of sperm were analysed by Computer-assisted sperm analyser (CASA). The sperm separated by each 6, 8, 10% of BSA gradients showed significantly hid value in motility, curvillinear velocity, straight-line velocity, average-path velocity, and beat-cross frequency as compared with control sperm(P$lt; 0.05). Artificial insemination was performed with sperm separated by 6% BSA gradients, which was revealed the highest sperm recovery. The pregnancy rate of sperm separated by 6% BSA gradients was 15.4% higher than that of the control sperm (P = 0.22). Therefore, the sperm separation by BSA gradients may be used to increase the motional characteristics of sperm relating the fertility of sperm and the pregnancy rate of artificial insemination in Hanwoo.