• 제목/요약/키워드: ABE

검색결과 351건 처리시간 0.028초

SWAT-EFDC 연계 모델링을 통한 입장저수지의 유사 해석 (Modeling Sedimentation Process in Ipjang Reservoir using SWAT and EFDC)

  • 신샛별;황순호;허용구;송정헌;김학관;강문성
    • 한국농공학회논문집
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    • 제60권3호
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    • pp.135-148
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    • 2018

  • Reservoir sedimentation is a major environmental issue, and various sediment load controls and plans have been proposed to secure clean and safe water resources. The objectives of this study were to estimate soil loss in the upper basins and predict sediment deposition in Ipjang reservoir using hydrologic and hydraulic model. To do so, SWAT (Soil and Water Assessment Tool) and EFDC (Environmental Fluid Dynamics Code) was used to estimate soil loss in two upper basins and to predict spatial distribution and amount of sediment deposition in the Ipjang reservoir, respectively. The hydrologic modeling results showed that annual average soil loss from the upper basins was 500 ton. The hydraulic modeling results demonstrated that sediment particles transported to the reservoir were mostly trapped in the vicinity of the reservoir inlet and then moved toward the bank over time. If long-term water quality monitoring and sediment survey are performed, this study can be used as a tool for predicting the dredging amount, dredging location and proper dredging cycle in the reservoir. The study findings are expected to be used as a basis to establish management solutions for sediment reduction.

  • https://doi.org/10.5389/KSAE.2018.60.3.135 인용 PDF KSCI

Towards efficient sharing of encrypted data in cloud-based mobile social network

  • Sun, Xin;Yao, Yiyang;Xia, Yingjie;Liu, Xuejiao;Chen, Jian;Wang, Zhiqiang
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제10권4호
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    • pp.1892-1903
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    • 2016

  • Mobile social network is becoming more and more popular with respect to the development and popularity of mobile devices and interpersonal sociality. As the amount of social data increases in a great deal and cloud computing techniques become developed, the architecture of mobile social network is evolved into cloud-based that mobile clients send data to the cloud and make data accessible from clients. The data in the cloud should be stored in a secure fashion to protect user privacy and restrict data sharing defined by users. Ciphertext-policy attribute-based encryption (CP-ABE) is currently considered to be a promising security solution for cloud-based mobile social network to encrypt the sensitive data. However, its ciphertext size and decryption time grow linearly with the attribute numbers in the access structure. In order to reduce the computing overhead held by the mobile devices, in this paper we propose a new Outsourcing decryption and Match-then-decrypt CP-ABE algorithm (OM-CP-ABE) which firstly outsources the computation-intensive bilinear pairing operations to a proxy, and secondly performs the decryption test on the attributes set matching access policy in ciphertexts. The experimental performance assessments show the security strength and efficiency of the proposed solution in terms of computation, communication, and storage. Also, our construction is proven to be replayable choosen-ciphertext attacks (RCCA) secure based on the decisional bilinear Diffie-Hellman (DBDH) assumption in the standard model.

  • https://doi.org/10.3837/tiis.2016.04.024 인용 PDF KSCI KPUBS HTML

GDPR 준수 가능한 블록체인 기반 접근제어 시스템 (GDPR Compliant Blockchain Based Access Control(GCBAC))

  • 임준호;천지영;노건태;정익래
    • 정보보호학회논문지
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    • 제30권6호
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    • pp.981-997
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    • 2020

  • 블록체인 기술은 탈중앙화된(decentralized) 분산원장(distributed ledger)과 합의 기반 구조를 바탕으로 높은 보안 수준을 제공할 수 있다는 장점이 있다. 이와 같은 블록체인 기술의 활용도 증진을 위해서는 헬스 케어, 전자상거래 등 개인정보 처리가 필요한 분야에서의 활용 방안 모색이 필요하다. 이를 위해서는, 블록체인 기반 시스템에서도 유럽 연합(EU) 개인정보보호 규정(GDPR, General Data Protection Regulation)으로 대표되는 개인정보보호 관련 법규 및 규정을 준수할 수 있어야 한다. 그러나, 블록체인의 자체 특성상 기록된 자료에 대한 불변성과 탈중앙성 때문에 기존 개인정보보호 규정의 요구사항을 블록체인상에서 기술적으로 구현함에 어려움이 있다. 본 논문에서 우리는 카멜레온 해시(chameleon hash)와 속성 기반 암호화(Attribute Based Encryption, 이하 ABE)를 활용하여 GDPR에서 요구하는 개인정보 주체의 권리를 보장 가능한 다중 체인(multi-chain)기반 접근제어 시스템을 제시한다. 끝으로 우리의 시스템에서는 기밀성과 무결성을 유지한 가운데, 개인정보 처리가 가능함을 보안 분석을 통해 보인다.

  • https://doi.org/10.13089/JKIISC.2020.30.6.981 인용 PDF KSCI HTML