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M-Commerce에서 Secure Card 기반의 결제 프로토콜 설계
김성열,조성지,유성진,배용근 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2
In order to provide a reliable M-Commerce, a payment solution with security functions should be required. User's mobile terminals used in M-Commerce services are diversifying to cellular phone, PDA, Smart phone etc. Among them, integration of PDA's interface and mobile connection overcomes the weak point of existing cellular phone depending on information via the internet. In this paper, the Secure Card based 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 stores it 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.
광주지역에서 발생한 토끼 Eimeria stiedae 감염증
배성열 ( Seong Yeol Bae ),김철희 ( Cheol Hee Kim ),고바라다 ( Ba Ra Da Koh ),박성도 ( Seong Do Park ),나호명 ( Ho Myeong Na ),김용환 ( Yong Hwan Kim ),오대영 ( Dae Yeong Oh ) 한국가축위생학회 1999 韓國家畜衛生學會誌 Vol.21 No.4
A rabbit farm reared about 500 New Zealand White in Kwangju city was occurred Eimeria stiedae infection. Morbidity and cumulative mortality were more than 39% and 14%, respectively, from May, 1997 to March, 1998. Most of cases with severe diarrhea were belong to younger than 2-month old. In necrospy, there were multifocally white nodules with about 1-5mm in diameter on the liver surface and dark greenish mucous exudate in intestinal lumen. Main microscopic lesions included marked hyperplasia of the bile duct epitheilia containing different developmental stages of Eimeria stiedae and inflammatory cell infiltration, and the degeneration of small intestinal epithelia. Many oocysts of Eimeria stiedae were detected in the intestinal contents and epithelia, the feces, the bile juice, the bile duct and the liver.
배성훈(Seong Hun Bae),홍준열(Joon Yeol Hong),배대석(Dae Seok Bae),김정수(Jeong Soo Kim) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.12
본 연구는 이원추진제 소형로켓엔진 개발의 선행연구 일환으로, 모델연소실 내부 메탄-산소 확산화염의 연소특성 분석을 위한 예비시험을 수행하였다. 연소실험에 사용된 인젝터는 단일 스월 인젝터이며, 인젝터의 리세스 길이가 존재하지 않는 lr / di = 0으로 설정하였다. 노즐을 제거하여 상압조건에서 실험을 진행하였고, DSLR 카메라를 이용하여 확산화염 이미지를 직접 획득하였다. 화염은 형상에 따라 크게 부착화염, 부상화염, 그리고 블로우아웃으로 구분되는 것을 확인하였다. This research is carried out for a preliminary study of the development of bipropellant small-rocket-engine. Combustion characteristics of the methane-oxygen diffusion flame in the model combustor are investigated. A single swirl-injector with the recess length set to lr / di = 0 is used for the combustion experiment. The experiment is conducted under the normal pressure condition with the nozzle removed. Direct images of the diffusion flame are captured by a DLSR camera. Various shapes of flame such as attached flame, detached flame, and blowout could be observed.
Malicious Processor Detection based on the Security Agent
Seong-Muk Choi,Yeol-Joo Ryou,Hoo-Ki Lee,Hee-Hoon Cho,Jong-Bae Kim 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.11
Recently, as Internet is widely used due to the increased spread of the internet network, the software with malicious intent is distributed via the internet and its infection path gets various too. In particular, attacks by Bot mainly work at C&C (command-and-control) server but it can be secured just by blocking IP because C&C server runs in form of IP. However, this attacker too gets gradually intelligent as they try to connect periphrastically in order to avoid server blocking. Once these malicious codes infiltrate user’s system, it is not easy to detect it through general detection method while it is running. In this paper, we propose malicious process detection system based on security agent in order to prevent damage caused by malicious code infection from spreading.
A Study on the Malicious Process Detection System Model based on Security Agent
Seong-Muk Choi,Yeol-Joo Ryou,Hoo-Ki Lee,Hee-Hoon Cho,Jong-Bae Kim 한국정보통신학회 2015 2016 INTERNATIONAL CONFERENCE Vol.7 No.1
As recently use of Internet gets increased rapidly, infection path through the network becomes diverse. In particular, attacks by Bot mainly work at C&C (command-andcontrol) server but it can be secured just by blocking IP because C&C server runs in form of IP. However, these attackers too get gradually intelligent as they try to connect periphrastically in order to avoid server blocking. Once these malicious codes infiltrate user’s system, it is not easy to detect it through general detection method while it is running. In this paper, so, we propose malicious process detection system based on security agent in order to prevent damage caused by malicious code infection from being spread.
Bae Gi Yeol,임명원,Eom Seong Woon,Lee Hae Lee,Lee Do Yup,Oh Yeong Ji 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.5
Elaeocarpus sylvestris, an evergreen tree widely distributed in Jeju Island, South Korea, contains polyphenolic compounds (phenols and flavonoids) exhibiting antioxidant, antiviral, and antibacterial activities. This study examines the antimicrobial, antioxidant, and cytotoxicity profiles of E. sylvestris extracts. Leaf extract (LE) and branch extract (BE) of E. sylvestris obtained using 60% methanol were filtered and concentrated. The antimicrobial efficacy of these extracts against foodborne pathogens and lactic acid bacteria was examined. The antioxidant property was tested along with assays to assess cytotoxicity and effects on cell proliferation. The extracts were also subjected to antioxidant assays and tested for cytotoxicity and effects on cell proliferation using human skin fibroblasts (Detroit 551). LE completely inhibited the growth of Staphylococcus aureus and Listeria monocytogenes at 100 mg/mL. Seven strains of lactic acid bacteria were susceptible to the whole extracts. LE significantly suppressed the growth of Weisella confusa, Pediococcus acidilactici, and Leuconostoc mesenteroides (p < 0.05). Yeasts (Pichia anomala and Pichia fermentans) exhibited significantly higher growth rates than lactic acid bacteria. Both extracts (100 mg/mL) significantly decreased H2O2 formation (>50%). The confluency of Detroit 551 cells was 68.07–87.52% at concentrations of 0–50 μg/mL for 24 h. In total, 130 metabolites were identified in BE and 128 in LE, including metabolites with potential benefits for skin improvement and photoprotection. A methanolic extract of E. sylvestris could be a promising source of natural bioactive materials for both microbial biocontrol and functional skin care cosmetics, with a wide range of applications in the food, cosmetic, and pharmaceutical industries.