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보안 메시징 프로토콜 MLS에서 관리자에 메시지노출에 관한 연구
권송희,최형기,Kwon, Songhui,Choi, Hyoung-Kee 한국정보보호학회 2022 정보보호학회논문지 Vol.32 No.2
Messenger applications applied end-to-end encryption on their own to prevent message exposure to servers. Standardization of a group messaging protocol called Message Layer Security (MLS) with end-to-end encryption is being discussed for secure and efficient message communication. This paper performs safety checks based on the operation process and security requirements of MLS. Confidentiality to a middleman server, which is an essential security requirement in messenger communication, can be easily violated by a server administrator. We define a server administrator who is curious about the group's communication content as a curious admin and present an attack in which the admin obtains a group key from MLS. Reminds messenger application users that the server can view your communication content at any time. We discuss ways to authenticate between users without going through the server to prevent curious admin attacks.
배은지,김병운,김미진,권송희,최지환,나해영 한국인간·식물·환경학회 2015 인간식물환경학회지 Vol.18 No.1
혈액액비 시비가 채소 묘의 생육 및 품질에 미치는 영향을 구명 하기 위해 실험을 수행하였다. 토마토와 고추 그리고 겨자채를 무 비와 유비에 각각 파종하였으며, 무비에 혈액액비를 시비하여 채소 묘의 생육변화를 비교 분석하였다. 유비 육묘에서 토마토의 초장, 생체중, 그리고 엽폭이 각각 20.5±0.6cm, 51.1±2.6g, 6.1±0.2cm 로 가장 높았으며, 엽수는 유비, 무비, 그리고 혈액액비 시비에서 각 각 14.9±0.8, 9.2±0.4, 18.1±0.5 개로 혈액액비를 시비하였을 때 가장 많았다. 고추는 초장(9.1±0.3 cm), 생체중(30.2±1.6 g), 그리 고 엽폭(2.2±0.1 cm) 등은 모두 유비 육묘에서 생육이 가장 좋았으 며, 혈액액비를 시비하였을 때 무처리구 보다 생육이 향상되었다. 고추의 엽수는 유비구 7.9±0.2, 무비구 5.1±0.2개로 혈액액비 시 비구에서 8.2±0.1으로 가장 높았다. 겨자채 묘의 경우 전체적으로 유비 처리구에서 높은 결과를 나타 내었으며, 혈액액비 처리구가 겨자채 묘의 생육에 큰 효과를 보이진 않았다. 전반적으로 유비 육묘에서 생육이 가장 좋았으나, 혈액액비를 시비한 육묘에서도 생육 이 향상되었다. 본 연구 결과 가축의 혈액액비는 도축장의 폐기물 에 의한 환경오염을 줄 일 수 있고, 관행비료를 대체하여 친환경 유 기농 묘 생산에 사용 가능할 것으로 사료된다. These experiments were performed to investigate the effects of the fertilization of vegetable seedlings with blood fertilizer on the seedlings’ growth and quality. Tomatoes, hot peppers, and leaf mustard seeds were sown in artificial soil with the conventional fertilizer, without fertilizer, and with blood fertilizer to analyze the changes in the growth of vegetable seedlings. When tomato was sowed in the artificial soil with the conventional fertilizer, the following highest values in the plant height, fresh weight, and leaf width were obtained: 20.56 cm, 51.16 g, and 6.12 cm, respectively. However, the total numbers of the leaves were 14.98, 9.24, and 18.15 in the artificial soil with the conventional fertilizer, the artificial soil without fertilizer, and the artificial soil with the blood fertilizer, respectively. The hot pepper seedlings sown in the artificial soil with the conventional fertilizer grew best in terms of their height (9.13 cm), fresh weight (30.26 g), and leaf width (2.21 cm). The greatest number of hot pepper leaves was obtained from the soil with the blood fertilizer (8.21), compared with the hot pepper seedlings sown in the artificial soil with the conventional fertilizer (7.92) and those sown in the artificial soil without fertilizer (5.12). The leaf mustard showed the highest overall results from the artificial soil with the conventional fertilizer, and showed insignificant results from the soil with the blood fertilizer. Overall, the best seedlings were obtained from the artificial soil with the conventional fertilizer, but the effect of the blood fertilizer treatment was the best in terms of the number of leaves of the hot pepper and tomato. This study suggested that environmental pollution caused by slaughterhouse waste can be reduced by using the blood of livestock as a fertilizer, instead of the conventional fertilizer, to produce environment-friendly organic seedlings.
나건주,권송희 한국청동기학회 2019 한국청동기학보 Vol.24 No.-
공주 금성동 유적에서는 청동기시대 지석묘 5기, 백제시대 주거지 2기·수혈군 1개소, 통일신라시대의 주거지 1기·석렬유구 3기·수혈 2기, 조선시대 수혈 1기, 일제강점기 이후 우물 1기 등 여러 시기에 걸쳐 다양한 성격의 유구가 확인되었다. 공주 금성동 유적에서 조사된 청동기시대의 지석묘는 묘역이라고 특정지을 만한 매장주체부 주위 구획석들이 뚜렷하게 보이지 않는 점에서 기존의 묘역 지석묘와 차이를 보이며, 묘역을 표시한다기 보다는 매장주체부 주위와 개석 상부에까지 흡사 봉토분의 분(墳)과 같이 적석을 높게 쌓아 묘를 축조하는 점에서 가장 큰 특징을 보이고 있다. 이러한 차이점이 기존의 청동기시대 제 묘제와 어떠한 상관관계를 갖고 있는지에 대해서는 후속 연구가 필요하다 판단된다. 금번 조사에서 확인된 지석묘들은 단독으로 조성된 예도 있지만, 3기 이상의 묘가 서로 연접된 형태를 취한 예도 확인되어서 당시의 묘제 발달과 사회 구조의 변화를 추적하는데 대단히 중요한 자료를 제공해 주고 있다.
배은지,김병운,김미진,권송희,최지환,나해영 인간식물환경학회 2015 인간식물환경학회지 Vol.18 No.1
These experiments were performed to investigate the effects of the fertilization of vegetable seedlings with blood fertilizer on the seedlings’ growth and quality. Tomatoes, hot peppers, and leaf mustard seeds were sown in artificial soil with the conventional fertilizer, without fertilizer, and with blood fertilizer to analyze the changes in the growth of vegetable seedlings. When tomato was sowed in the artificial soil with the conventional fertilizer, the following highest values in the plant height, fresh weight, and leaf width were obtained: 20.56 cm, 51.16 g, and 6.12 cm, respectively. However, the total numbers of the leaves were 14.98, 9.24, and 18.15 in the artificial soil with the conventional fertilizer, the artificial soil without fertilizer, and the artificial soil with the blood fertilizer, respectively. The hot pepper seedlings sown in the artificial soil with the conventional fertilizer grew best in terms of their height (9.13 cm), fresh weight (30.26 g), and leaf width (2.21 cm). The greatest number of hot pepper leaves was obtained from the soil with the blood fertilizer (8.21), compared with the hot pepper seedlings sown in the artificial soil with the conventional fertilizer (7.92) and those sown in the artificial soil without fertilizer (5.12). The leaf mustard showed the highest overall results from the artificial soil with the conventional fertilizer, and showed insignificant results from the soil with the blood fertilizer. Overall, the best seedlings were obtained from the artificial soil with the conventional fertilizer, but the effect of the blood fertilizer treatment was the best in terms of the number of leaves of the hot pepper and tomato. This study suggested that environmental pollution caused by slaughterhouse waste can be reduced by using the blood of livestock as a fertilizer, instead of the conventional fertilizer, to produce environment-friendly organic seedlings.