Comments and Improvements on Key-Exposure Free Chameleon Hashing Based on Factoring
Comments and Improvements on Key-Exposure Free Chameleon Hashing Based on Factoring
复制标题
DOI：
10.1007/978-3-642-21518-6_29
复制
发表时间：
2010-10
期刊：
影响因子：
--
通讯作者：
Xiaofeng Chen;Haibo Tian;Fangguo Zhang;Yong Ding
中科院分区：
文献类型：
--
作者：
Xiaofeng Chen;Haibo Tian;Fangguo Zhang;Yong Ding
变色龙签名同时提供了签名消息的不可否认性和不可传递性。然而，变色龙签名的初始构造遭受变色龙散列的密钥暴露问题。这对收件人伪造签名形成了强烈的抑制，部分破坏了不可转让的概念。近年来，人们提出了一些基于不同假设的无密钥暴露的变色龙哈希方案，本文提出了基于因子分解的无密钥暴露的变色龙哈希方案的一些安全缺陷[10]。此外，我们提出了一个改进的变色龙散列方案的基础上的因式分解，享有所有所需的安全概念的变色龙散列密钥不暴露。
Chameleon signatures simultaneously provide the properties of non-repudiation and non-transferability for the signed message. However, the initial constructions of chameleon signatures suffer from the key exposure problem of chameleon hashing. This creates a strong disincentive for the recipient to forge signatures, partially undermining the concept of non-transferability. Recently, some specific constructions of key-exposure free chameleon hashing based on various assumptions are presented.In this paper, we present some security flaws of the key-exposure free chameleon hash scheme based on factoring [10]. Besides, we propose an improved chameleon hash scheme without key exposure based on factoring which enjoys all the desired security notions of chameleon hashing.