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타원곡선 암호를 이용한 PDA 기반의 신용카드 결제 프로토콜 설계
유성진,김성열,윤천균,정일용,Yu, Seong-Jin,Kim, Seong-Youl,Youn, Chun-Kyun,Chung, Il-Yong 한국정보처리학회 2003 정보처리학회논문지D Vol.10 No.6
M-Commerce 에서 안전한 서비스를 제공하기 위해서는 보안 기능을 갖춘 결제 솔루션이 필수적이다. M-Commerce 를 이용하기 위한 사용자의 이동 단말기는 핸드폰, PDA, 스마트폰 등으로 다양화 되어가고 있으며, 이 중에서도 PDA의 인터페이스와 이동 접속은 기존 핸드폰의 유선 인터넷의 정보 의조도가 높은 단점을 극복할 수 있다. 본 논문에서는 타원곡선 암호를 이용하여 PDA 기반의 신용카드 결제 시스템을 설계하였다. 제안된 시스템의 SECURE CARD 모듈은 PDA 단말기 자체에 개인정보, 배송정보, 카드정보를 암호화하여 안전하게 저장함으로써 단말기의 정보입력시에 필요한 불편함을 제거하였다. 또한 프로토콜은 M-Commerce 에서 인증, 기밀성, 부인봉쇄 서비스 등의 보안기능을 제공하도록 설계되었다. In order to provode information services on M-Commerce, a payment solution with security function should be required. User's mobile terminals for using M-Commerce services are diversifying to cellular phone, PDA, Smart phone etc. Among them, intergration of PDA's interface and mobile connection overcomes the weak point of existing cullular phone depending on information via the internet. In this paper, the protocol for a credit card transaction on PDA using ECC is presented. Secure Card module on this protocol encrypts user's information such as private information, delivery information and credit card information and store them on PDA in order to free from inputting information whenever it is used. This scheme also offers security services on M-Commerce including authentication, confidentiality, integration, non-repudiation and so on.
유성진,조규태,이재식,Yu, Seong-Jin,Jo, Gyu-Tae,Lee, Jae-Sik 한국건설안전협회 2012 建設 安全技術 Vol.55 No.-
Aging society may approached to our society during snatch very, and enter in super aging society for more span. Investment that we which live 21th century are many in people's quality of life elevation meantime did not consist, but stand in visual point that must improve many portions forward. For front, repletions for many equipments that consider aged on our society must consist, and much researches may have to be gone for this. According to traffic accident result, percentage of older pedestrian deaths was 46.5% as much in Korea. In particular, the crossing accidents by 59% or more of the older pedestrian traffic safety measures that target is an urgent situation. Therefore, in this study was to identify the domestic status and problem on no-sidewalk region for older pedestrians. In addition, side walk the installation and maintenance plan presented to prepare for aging society.
유성진,Yu, Seong-Jin 한국건설안전협회 2007 建設 安全技術 Vol.43 No.-
In this paper, a ground disturbance effects, strength and consolidation characteristics of soft clay through using the large block samples($\theta$:300mm, H:400mm) and the piston samples, f hose which had been gathered in west coast and south coast. Especially, we have assessed the coefficient of horizontal consolidation when penetrating the mandrel considering the variance of ratio between diameter and height in drainage sample through the experiment of the oedometer test and Rowecell and also investigated the disturbance area in smear zone by interior model test, the strength originated by disturbance, the variance in characteristics of the consolidation. As the result, the large block sample has been investigated that ihe uniaxial compression test(qu) was shown bigger than the piston sample by about 11-19%. Under the size of anistropy in consolidation, the coefficient ratio of consolidation(ch/cv,) perfomed by standard consolidation test(SC) was shown bigger than that of (Cro/Cv) by the Rowecell test. And the coefficient ratio of consolidation(Cro/Cv) perfomed by piston sample was evaluated bigger than that Of (Cro/Cv) by the large block sample by about 0.9-1.9. The coefficient ratio of consolidation along with the variance in ratio of between diameter and height when penetrating the mandrel was shown big difference according to the characteristics of soil of the specimen. In addition, ds/dw of smear zone at the marine clay in west-south was ranged from 1.6 to 4.2. The width of variance in rat io[(qud)/(quud)] of strength n the area between disturbance and undisturbance was shown big as about 72-91% but the principle was judged with the similiar range when the decrease of the strength in smear zone become the zone under 25% in unditurbance area.
플라스틱보드드레인(PBD)재의 품질평가 기법에 대한 고찰
김종국(Jong-Kook Kim),윤원섭(Won-Sub Yoon),채영수(Young-Su Chae),유성진(Seong-Jin Yu),김용철(Yong-Cheol Kim) 한국토목섬유학회 2007 한국토목섬유학회 학술발표회 Vol.2007 No.4
This paper present that Investigated about PBD evaluation of quality controls on the basis of PBD quality standard that is applied to vertical drain. Main method of test is tensile strength, Apparent Opening Size and drain capacity test. It seems reasonable that to evaluate calculating analysis result of tensile strength MD and CD average tensility. According to analysis results of Apparent Opening Size, Dry testing method is bigger than Wet testing method. It thought must decide on quality standard through considering field soil particle. Drain capacity test have different standard according to method of test. Therefore, it seems to necessary transform considered that standard method of test, test condition, specification need.