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논문 기본 정보

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학술저널
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한국정보처리학회 JIPS(Journal of Information Processing Systems) JIPS(Journal of Information Processing Systems) 제14권 제4호
발행연도
2018.1
수록면
837 - 850 (14page)

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Bitcoin is a decentralized crypto-currency, which is based on the peer-to-peer network, and was introducedby Satoshi Nakamoto in 2008. Bitcoin transactions are written by using a scripting language. The hash valueof a transaction’s script is used to identify the transaction over the network. In February 2014, a Bitcoinexchange company, Mt. Gox, claimed that they had lost hundreds of millions US dollars worth of Bitcoins inan attack known as transaction malleability. Although known about since 2011, this was the first knownattack that resulted in a company loosing multi-millions of US dollars in Bitcoins. Our reason for writing thispaper is to understand Bitcoin transaction malleability and to propose an efficient solution. Our solution is asoftfork (i.e., it can be gradually implemented). Towards the end of the paper we present a detailed analysis ofour scheme with respect to various transaction malleability-based attack scenarios to show that our simplesolution can prevent future incidents involving transaction malleability from occurring. We compare ourscheme with existing approaches and present an analysis regarding the computational cost and storagerequirements of our proposed solution, which shows the feasibility of our proposed scheme.

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