南華大學機構典藏系統:Item 987654321/25983
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    题名: On the Privacy of ＂User Efficient Recoverable Off-Line E-Cash Scheme with Fast Anonymity Revoking＂
    作者: 周志賢;Chou, Jue-Sam;Chen, Ya-lin
    貢獻者: 資訊管理學系
    关键词: Anonymity revocation;digital signatures;electronic commerce and payment;off-Line E-Cash;recover-able;RSA
    日期: 2015-11
    上传时间: 2018-01-05 15:34:54 (UTC+8)
    摘要: Recently, Fan et al. proposed a novel e-cash scheme which allows a user to recover the e-cash he lost. They claimed their e-cash possesses properties of anonymity, unlinkability (i.e. untraceability), bank-off-line payment, double-spending detection, and anonymity revocation. The e-cash untraceability is greatly related to users' privacy and indicates that no one including the issuer bank can link e-cash to any user when the e-cash is legally spent. Al-though, the authors have formally proved the unlinkability of their scheme, we still found a loophole to compromise user's privacy. That is, an issuer bank or an attacker who intrudes the issuer bank's system can link e-cash to a user by collecting e-cash withdrawal and deposit transaction messages. This may make the user's shopping behaviors or location information exposed.
    關聯: International Journal of Network Security
    vol. 17, no. 6
    pp.708-711
    显示于类别:[資訊管理學系] 期刊論文

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