论文标题
具有前向安全性的晶格盲目签名
Lattice Blind Signatures with Forward Security
论文作者
论文摘要
盲目签名在电子现金和电子投票系统中都起着重要作用。盲目签名应确保各种攻击（例如签名伪造）。这项工作特别关注了秘密关键曝光攻击，这完全打破了数字签名。抵抗秘密钥匙暴露攻击的签名被称为前向安全的签名，即披露当前的秘密密钥不会损害过去的秘密密钥。这意味着前瞻性签名必须包括一段时间内的秘密键演变的机制。 本文构建了第一个盲目签名，该签名是前向安全的。该结构基于晶格设置中的SIS假设。应用的核心技术是时间段的二进制树数据结构，以及密钥进化机制的陷阱门委托。
Blind signatures play an important role in both electronic cash and electronic voting systems. Blind signatures should be secure against various attacks (such as signature forgeries). The work puts a special attention to secret key exposure attacks, which totally break digital signatures. Signatures that resist secret key exposure attacks are called forward secure in the sense that disclosure of a current secret key does not compromise past secret keys. This means that forward-secure signatures must include a mechanism for secret-key evolution over time periods. This paper gives a construction of the first blind signature that is forward secure. The construction is based on the SIS assumption in the lattice setting. The core techniques applied are the binary tree data structure for the time periods and the trapdoor delegation for the key-evolution mechanism.
