• Title/Summary/Keyword: 취소

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1-out-of-L Electronic Voting System with Ballot-Cancellation (투표-취소가 가능한 1-out-of-L 전자투표 시스템)

  • Yang, Hyung-Kyu;An, Youn-Hwa
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.32 no.1C
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    • pp.86-93
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    • 2007

  • In this paper, we present an electronic voting system based on cryptographic techniques. Recently, some countries have used e-voting systems using an electronic voting device instead of a voting sheet. These e-voting systems are the early stage which is not online voting. Many cryptographers have studied on-line e-voting systems based on cryptographic techniques. The existing 1-out-of-L e-voting systems are based on E1Gamal cryptosystem. To reduce computational complexity, we use r-th residue encryption scheme and compare the computational complexity of our 1-out-of-L e-voting system with that of the 1-out-of-L e-voting system based on E1Gamal cryptosystem. Moreover, we extend the proposed 1-out-of-L e-voting system to ballot-cancellation property The existing e-voting systems had been overlooked the ballot-cancellation property. There is the reason that the ballot is cancelled according to an election law. For our e-voting system with ballot-cancellation property, we extend the homomorphic property based on r-th residue encryption. The extended homomorphic property is used to cancel votes with guaranteeing privacy and universal verifiability.

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A Study on the Seller's Errors in Internet Shopping Mall Transactions (인터넷쇼핑몰 거래에 있어서 매도인의 착오에 관한 고찰)

  • Yoon, Chang-Sul
    • Journal of Digital Convergence
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    • v.8 no.2
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    • pp.147-160
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    • 2010

  • Internet shopping mall business has taken its place as a major form of e-commerce and is evolving constantly. At the same time, disputes of various kinds are also arising in proportion to the evolution. A typical example is when a consumer purchased a product from an internet shopping mall and the seller wants to cancel or withdraw the sales contract saying that he miswrote the price or other important information when posting the product on the internet. It's about the error on the seller's part. Civil Law Chapter 109, legal principles on errors, appears to assume the case of natural declaration of intention. It was observed that legal principles on errors defined by the Civil Law are also applied in internet shopping malls, where declaration of intention is made electronically. In transactions involving internet shopping malls, where the seller's indication and advertisement constitutes an inducement to offer, the seller may cancel a contract concluded by the consumer's offer and the seller's acceptance if the seller finds errors on his part, and adequacy of the cancellation should be judged depending on specific cases. That is, the judgment of the important ground that comprises prerequisites for cancellation and presence of negligence may depend on how much difference there is between the normal price and the posted price on a specific case. Also, considering the cases where negligence was not perceived on the seller's miswriting of the price, the seller may cancel the transaction in a similar situation.

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A Study on archiving problems for electronic journals according to subscription cancellation (구독취소에 따른 전자저널 컨텐츠의 소실에 관한 연구)

  • 신은자
    • Proceedings of the Korean Society for Information Management Conference
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    • 2001.08a
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    • pp.255-258
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    • 2001

  • 전자저널의 컨텐츠는 출판사의 서버에 디지털파일로 축적되어있으므로 출판사의 사정에 따라 또는 자관의 구독취소 결정에 따라 접속이 중단되는 사태가 발생할 경우 종전의 전자저널 구독분까지 이용할 수 없어 결과적으로 장서가 소실되는 결과를 가져오게 된다. 일부 출판사에서는 과월호 컨텐츠를 수록한 CD를 제공하여 이를 보완하고는 있으나 소장매체의 수명이 한시적일 뿐더러 출판사에서 계속해서 상당한 비용이 소요되는 과월호 컨텐츠 보존을 수행할 지 또한 의문이다. 이 연구는 선진 외국의 사례를 바탕으로 전자저널 컨텐츠의 영구보존에 관한 국내 도서관의 적절한 대처방안을 모색하고자 하였다.

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