Attack and improvements of fair quantum blind signature schemes

Attack and improvements of fair quantum blind signature schemes
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公平量子盲签名方案的攻击与改进

DOI:
10.1007/s11128-012-0509-1
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发表时间:
2013-06
影响因子:
2.5
通讯作者:
Qiu, Daowen
Qiu, Daowen
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zou, Xiangfu;Qiu, Daowen

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参考文献

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盲签名方案允许用户获得消息的签名,而签名者既不了解消息也不了解结果签名。因此,盲签名被用于实现加密协议,以提供某些参与者的匿名性,例如:安全的电子支付系统和电子投票系统。公平盲签名是一种盲签名形式,当出于法律原因需要时,可以在受信任实体的帮助下删除匿名性。最近,提出了一种公平的量子盲签名方案,并被认为是安全的。本文首先指出存在一种新的针对公平量子盲签名方案的攻击。攻击表明,如果任何发送者拦截了任何有效签名,他(她)可以伪造任何消息的有效签名,并且无法被伪造的盲签名跟踪。在此基础上,对现有的量子盲签名方案进行改进,构造了一个公平的量子盲签名方案。提出的公平量子盲签名方案能够抵御上述攻击。进一步证明了所提出的公平量子盲签名方案的安全性,并与其他方案进行了比较。
Blind signature schemes allow users to obtain the signature of a message while the signer learns neither the message nor the resulting signature. Therefore, blind signatures have been used to realize cryptographic protocols providing the anonymity of some participants, such as: secure electronic payment systems and electronic voting systems. A fair blind signature is a form of blind signature which the anonymity could be removed with the help of a trusted entity, when this is required for legal reasons. Recently, a fair quantum blind signature scheme was proposed and thought to be safe. In this paper, we first point out that there exists a new attack on fair quantum blind signature schemes. The attack shows that, if any sender has intercepted any valid signature, he (she) can counterfeit a valid signature for any message and can not be traced by the counterfeited blind signature. Then, we construct a fair quantum blind signature scheme by improved the existed one. The proposed fair quantum blind signature scheme can resist the preceding attack. Furthermore, we demonstrate the security of the proposed fair quantum blind signature scheme and compare it with the other one.
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