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中文摘要：
作为一种能够提供不可否认性的密码学算法，由于计算效率较高，Hash链被广泛应用于电子微支付方案中。为了进一步提高系统的效率，可以同时采用多个Hash链表示不同的面值进行微支付。由于Hash链存在有限长度的限制，系统的设计需要尽量降低再生Hash链时导致的额外开销。该文提出一种高效的基于一次性签名的可同时再生多个Hash链的构造方法，分析了这种构造内在的不可否认性和再生配置的灵活性，讨论了在多面值微支付巾的应用。这种构造方法能够提高同时使用多个Hash链的系统的效率。
英文摘要：
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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