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백승호(Seung-Ho Baek),정윤수(Yun-Soo Jeong),원종권(Jong-Kwon Won),이상호(Sang-Ho Lee) 한국컴퓨터정보학회 2005 韓國컴퓨터情報學會論文誌 Vol.10 No.3
최근 인터넷을 통한 거래의 활성화로 인하여 소액지불시스템의 필요성이 더욱 커지고 있으며, 그에 따라 지불금액에 대한 보호뿐만 아니라 사용자의 정보보호에 대한 요구도 증대되고 있다. 그러나 기존의 소액지불시스템들은 익명성을 제공하지 못하거나 익명성으로 인한 지불처리 비용 증가라는 문제점을 가진다. 이 논문에서는 사용자의 익명성을 보장하고 동시에 지불금액을 보호하는 사용자 중심의 소액지불시스템을 제안한다. 제안 시스템은 익명서명 방법으로 사용자 정보를 암호화한 후 난수와의 조합으로 은닉 서명된 익명 아이디를 사용한다. 또한 인증서를 통한 상품과 지불금액 재확인 과정을 통해 사용자의 지불 금액을 보호하고, 공개키 대신 비밀키와 세션키를 사용하므로 효율성을 향상시킨다. Now it is increasing the necessity for micropayment system according to activation for trade on internet. Because of the reason, it is requesting safety for personal information as well as for payment cost. But current micropayment systems cannot support anonymity or have heavy overheads in payment process. This paper suggests a micropayment system to keep anonymity of users and also to keep payment cost safe. The proposed system is to use blind signature anonymous ID which is combined nonce with an encryption of personal information. It also keeps payment cost of users by reconfirmation payment cost and product from certification and increases the computational efficiency by using secret key and session key instead of public key.
파프리카 중 tetraconazde의 수입 농산물 잔류허용기준 설정
조일규 ( Ii Kyu Cho ),오영곤 ( Young Gon Oh ),무스픽 ( Musfiqur Rahman ),설재웅 ( Jae Ung Seol ),이동기 ( Dong-gi Lee ),김지명 ( Ji Myung Kim ),정윤수 ( Yun Soo Jeong ) 한국환경농학회 2020 한국환경농학회 학술대회집 Vol.2020 No.-
The import tolerance of tetraconazole in paprika was proposed using OECD Maximum Residue Limit (MRL) calculator after conducting three different field trials to promote export of it to Taiwan. Pre-harvest interval (PHI) of residual pattern and degradation dynamic of tetraconazole in paprika were determined using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Samples were extracted with acetonitrile and a mixture of salts and dilution was performed for purification. A six point matrix matched calibration curve was constructed which provided excellent linearity with coefficient of determination (R2) ≥ 0.999. The quantification limits were 0.001 mg/kg. The method was validated in quintuplicate at three different concentrations resulted acceptable recovery ranging from 89.9~104.6% with relative standard deviation (RSD) ≤ 1.2% among the three filed sites. The developed method was applied to the field treated sample harvested at different intervals. In PHI trial, the tetraconazole residues were ranged 0.28-0.99 mg/kg in the field site 1 (Hwasun), 0.44 ~ 0.97 mg/kg in the field site 2 (Jinju), and 0.15 ~ 0.51 mg/kg in the field site 3 (Nomwon). Whereas, in the degradation trial, the observed residues were 0.07 ~ 0.53 mg/kg in the field site 1 and 0.14 ~ 0.29 mg/kg in the field site 3, Consequently, the import tolerance of tetraconazole in paprika using OECD MRL calculator was proposed to 2.0 mg/kg, which is different as the MRL(1.0 mg/kg) for pimento established by Republic of Korea. In conclusion, the residue study supported to propose 2.0 mg/kg as a MRL of tetraconazole for paprika.