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ECC(Elliptic Curve Crptographics) 기반의 보안프로세서를 위한 스칼라 곱셈기의 FPGA 구현
최선준 ( Seon-jun Choi ),황정태 ( Jeong-tae Hwang ),김영철 ( Young-chul Kim ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1
The ECC(Elliptic Curve Cryptogrphics), one of the representative Public Key encryption algorithms, is used in Digital Signature, Encryption, Decryption and Key exchange etc. The key operation of an Elliptic curve cryptosystem is a scalar multiplication, hence the design of a scalar multiplier is the core of this paper. Although an Integer operation is computed in infinite field, the scalar multiplication is computed in finite field through adding points on Elliptic curve. In this paper, we implemented scalar multiplier in Elliptic curve based on the finite field GF(2163). And we verified it on the Embedded digital system using Xilinx FPGA connected to an EISC MCU(Agent 2000). If my design is made as a chip, the performance of scalar multiplier applied to Samsung 0.35 μ m Phantom Cell Library is expected to process at the rate of 8kbps and satisfy to make up an encryption processor for the Embedded digital information home system.
ATSC DTV 수신기의 수신 성능 개선을 위한 NIM Interface 구현
장우영 ( Woo-young Jang ),최선준 ( Seon-jun Choi ),김영철 ( Young-chul Kim ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.2
본 논문은 ATSC 지상파 디지털 TV수신을 위한 효율적인 NIM Interface 구현에 관한 것을 제안하고자 한다. ATSC 규격에 만족하는 NIM Module의 최적화로 다른 정보가전들의 소형화를 가져오며 튜너와 복조IC 와의 RF 인터페이스 기술의 문제점을 해결해 준다. OrCAD Tool을 사용하여 NIM Interface를 해결하였으며, 그 결과를 나타내었다.
비단잉어 양어에 있어서 패각 황토볼과 시판 여과재와의 수질개선 효율 비교
박상진 ( Sang-jin Park ),이동화 ( Dong-hwa Lee ),제도윤 ( Do-yun Je ),최선준 ( Seon-jun Choi ),김준겸 ( Jun-gyeom Kim ),김병곤 ( Byeong-gon Kim ),정정조 ( Cheong-jo Cheong ) 한국환경기술학회 2023 한국환경기술학회지 Vol.24 No.1
The purpose of this study is to compare the characteristics of water quality for pH control and algal bloom prevention between oyster shell loess balls and commercial filter media to identify the possibility of utilization as filter material in an ornamental fish tank. The porosity of the SL filter material produced using an oyster shell was 65.33 %, NM was 63.67 %, CP was 87.67 %, and YK was 50.67 %. In the case of SL, the higher the porosity, the greater the specific surface area that can be contacted in the water, and the attachment of microorganisms becomes easier, so it is judged to have suitable conditions for use as a filter medium. The reaction time was varied from 50 g of the injection amount of the filter medium to pH 6.5 and measured for 0 to 120 hours to compare the water quality characteristics. Commercial filter media showed a range of pH 7.2 to 7.5. SL increased to pH of 11.8 at 120 hours, indicating that the range of pH increase was greater than that of commercially available filter media. The PO<sub>4</sub>-P removal rate according to the reaction time was found to be in the range of about 10.0 to 25.2 % for commercial filter media. SL showed a high removal rate of 98.1 % after 12 hours, and close to 100 % after 24 hours. The pH was set to 6.5 and the injection amount of the filter medium was varied from 25 to 100 g the reaction was performed for 24 hours. SL is pH 9.66 ~ pH 10.46 and commercial filter media was found to increase to pH 6.6 ~ pH 7.77. The removal rate of PO<sub>4</sub>-P was about 100% when more than 50 g of SL was injected, and commercial filter media were about 10 to 25 %. After adjusting the initial pH to 5~9, 50 g of the filter medium was injected, and the change in water quality was measured after 24 hours. commercial filter media were found to be pH 6.90 ~ pH 8.40, SL was pH 9.77 ~ pH 11.60. The PO<sub>4</sub>-P removal rate showed that SL showed a removal rate close to 100 % regardless of the pH condition.