一種新穎的可再生多Hash鏈的構(gòu)造
A Novel Construction of Re-initializable Multi-Hash Chains
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摘要: 作為一種能夠提供不可否認(rèn)性的密碼學(xué)算法，由于計算效率較高，Hash鏈被廣泛應(yīng)用于電子微支付方案中。為了進(jìn)一步提高系統(tǒng)的效率，可以同時采用多個Hash鏈表示不同的面值進(jìn)行微支付。由于Hash鏈存在有限長度的限制，系統(tǒng)的設(shè)計需要盡量降低再生Hash鏈時導(dǎo)致的額外開銷。該文提出一種高效的基于一次性簽名的可同時再生多個Hash鏈的構(gòu)造方法，分析了這種構(gòu)造內(nèi)在的不可否認(rèn)性和再生配置的靈活性，討論了在多面值微支付中的應(yīng)用。這種構(gòu)造方法能夠提高同時使用多個Hash鏈的系統(tǒng)的效率。
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關(guān)鍵詞:
- Hash鏈;不可否認(rèn)性;一次性簽名
Abstract: As a cryptography algorithm that can provide non-repudiability, hash chains are widely used in electronic micropayment schemes because of its efficiency. In order to further improve efficiency, multiple hash chains can be simultaneously used to represent different denominations in micropayment. Because of the limitation that hash chain has a limited length, system design has to reduce the overhead when hash chains are re-initialized. A efficient one-time-signature-based construction is proposed which can simultaneously re-initialize multiple hash chains and its intrinsic non-repudiability and flexibility of configuration in re-initialization are analyzed. The application of the construction in multi-denomination micropayment is illustrated. The proposed construction can improve the efficiency of systems with multiple hash chains. -
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