基于承諾的可驗(yàn)證公平性微支付
doi: 10.11999/JEIT160300
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2.
(桂林電子科技大學(xué)數(shù)學(xué)與計(jì)算科學(xué)學(xué)院 桂林 541004) ②(桂林電子科技大學(xué)廣西可信軟件重點(diǎn)實(shí)驗(yàn)室 桂林 541004)
國(guó)家自然科學(xué)基金(61363069, 61301166, 61662016),桂林電子科技大學(xué)研究生教育創(chuàng)新計(jì)劃(2016YJCX44),廣西研究生教育創(chuàng)新計(jì)劃(YCSZ2015149)
Verifiable Fairness Micropayment Scheme Based on Commitment
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2.
(School of Mathematics and Computational Science, Guilin University of Electronic Technology, Guilin 541004, China)
The National Natural Science Foundation of China (61363069, 61301166, 61662016), The Innovation Project of GUET Graduate Education (2016YJCX44), The Innovation Project of Guangxi Graduate Education (YCSZ2015149)
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摘要: 微支付交易具有交易量極大且單次交易額極小的特點(diǎn),使得復(fù)雜的認(rèn)證協(xié)議不適用于微支付。Micali等人(2002)提出的基于概率選擇微支付方案,把微支付聚合成宏支付,大幅提高了微支付的效率。Liu-Yan在(2013)提出了保證所有參與者的數(shù)據(jù)融入概率選擇結(jié)果的生成, 而且使得所有參與者可以驗(yàn)證結(jié)果的公平性。然而,Liu-Yan方案中銀行可能獲得額外利益,從而破壞了協(xié)議的公平性。該文首先分析了Liu-Yan方案的安全威脅,并且以1個(gè)用戶-1個(gè)商家的模型代替Liu-Yan方案中大量用戶-1個(gè)商家的模型,以數(shù)據(jù)承諾技術(shù)為基礎(chǔ)保障結(jié)果的公平性與可驗(yàn)證性。Abstract: Due to the large transaction number and tiny value in micropayment, it is not practical to authenticate each transaction. Micali et al. (2002) propose a lottery-based micropayment to integrate multiple micropayment to one macro-payment that is worth using complicated authentication. Liu-Yan scheme (2013) guarantees the result is verifiable by involving all participants data. However, there still exists a flaw that the malicious bank maybe obtain the illegal benefit by controlling the specific purchaser not be selected to execute the macro-payment, moreover, this attack can not be detected. In this paper, the flaw is firstly described, then, an improved version is proposed. Specifically the model multiple purchasers to 1 merchantin Liu-Yans scheme is replaced with a new model 1 purchaser to 1 merchant, which guarantees the fairness and verifiability for all using the commitment technique.
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Key words:
- Micropayment /
- Commitment /
- Fairness /
- Verifiability
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