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Key Evolving Attribute-Based Signature Under Short Integer Solution Problem

机译:短整数解问题下基于密钥演化的属性签名

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摘要

Key exposure is a severe threat in digital signature, the scheme will be compromised provided that the private key of the signature is revealed. To remove the destruction of key exposure, the private key must be kept updated in the process of the signature. As a new cryptographic primitive, Attribute-based signature (ABS) scheme has the limitation in practical applications because the private key may be leaked. So far, very little works have focused on the key leakage of ABS, especially in the setting of lattices. To deal with the problem, we present the construction of Key evolving attribute-based signature (ke-ABS) under Short integer solution (SIS) problem. As a new research field in the point, our scheme has considered a threshold access structure, which allows users with attributes satisfying the defined policy that can generate a valid signature without revealing more information. Compared with the known schemes, our scheme provides an assurance of unforgeability and attribute signer privacy.
机译:密钥公开是数字签名中的严重威胁,如果公开签名的私钥,则该方案将受到损害。为了消除密钥公开的破坏,必须在签名过程中保持私钥的更新。作为一种新的加密原语,基于属性的签名(ABS)方案在实际应用中具有局限性,因为私钥可能会泄漏。到目前为止,很少有工作集中在ABS的关键泄漏上,特别是在晶格设置方面。为了解决这个问题,我们提出了在短整数解(SIS)问题下构造基于密钥演化属性的签名(ke-ABS)的方法。作为这一点上的一个新的研究领域,我们的方案考虑了阈值访问结构,该结构允许具有满足已定义策略的属性的用户可以生成有效签名而不会泄露更多信息。与已知方案相比,我们的方案可确保不可伪造和属性签名者隐私。

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