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强指定验证者签名只允许指定的验证者验证签名的有效性,它可应用于招标和发放软件许可证等场合.首先利用Boyen提出的基于格的签名方案构造了一个基于格的强指定验证者签名方案,然后在标准模型下基于小整数解(Small integer solution,SIS)问题证明了该方案在适应性选择消息攻击下是存在性不可伪造的.迄今人们提出的基于格的强指定验证者签名方案都是在随机预言模型下可证明安全的,而随机预言模型存在一定的安全缺陷,因此文中提出的基于格的强指定验证者签名方案更有实际意义.
Strongly specified verifier signature only allows the designated verifier to verify the validity of the signature, which can be applied to bidding and software license issuance.Firstly, based on the lattice-based signature scheme proposed by Boyen, a lattice-based strongly designated verifier Signature scheme and then based on the SIS (Small Integer Solution) problem under the standard model, the scheme is proved to be existence-unforgetable under the attack of adaptive selective messages. So far, the proposed lattice-based strong designated verifier signature All the schemes are proved to be secure under the random prediction model. However, the random prediction model has some security flaws. Therefore, the lattice-based strongly designated verifier signature scheme proposed in this paper is more practical.