Certificateless key-insulated signature without random oracles
Certificateless key-insulated signature without random oracles
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DOI：
10.1631/jzus.a0820714
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发表时间：
2009-12
影响因子：
3.2
通讯作者：
Zhongmei Wan;Xuejia Lai;J. Weng;Shengli Liu;Yu Long;Xuan Hong
中科院分区：
文献类型：
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作者：
Zhongmei Wan;Xuejia Lai;J. Weng;Shengli Liu;Yu Long;Xuan Hong
私钥的泄漏已经成为威胁密码系统安全的一个严重问题。为了减少潜在的危险引起的私钥泄漏，Dodis等人。（2003）提出了第一个密钥隔离签名方案。针对无证书签名方案中的私钥泄漏问题，设计了第一个无证书密钥隔离签名方案。我们的方案将密钥隔离机制应用于无证书密码学，即既没有证书也没有密钥托管。我们综合了沃茨（2005）的签名方案、Paterson和Schuldt（2006）的基于身份的签名方案以及Liu等人的签名方案。（2007）的无证书签名方案，得到一个无证书密钥绝缘签名方案。我们的计划有两个可取的性质。首先，它的安全性可以在非配对的广义双线性Diffie-Hellman（NGBDH）猜想下得到证明，而不需要使用随机预言机模型;其次，它解决了基于身份的密钥绝缘签名中的密钥托管问题。
Leakage of the private key has become a serious problem of menacing the cryptosystem security. To reduce the underlying danger induced by private key leakage, Dodis et al.(2003) proposed the first key-insulated signature scheme. To handle issues concerning the private key leakage in certificateless signature schemes, we devise the first certificateless key-insulated signature scheme. Our scheme applies the key-insulated mechanism to certificateless cryptography, one with neither certificate nor key escrow. We incorporate Waters (2005)’s signature scheme, Paterson and Schuldt (2006)’s identity-based signature scheme, and Liu et al.(2007)’s certificateless signature scheme to obtain a certificateless key-insulated signature scheme. Our scheme has two desirable properties. First, its security can be proved under the non-pairing-based generalized bilinear Diffie-Hellman (NGBDH) conjecture, without utilizing the random oracle model; second, it solves the key escrow problem in identity-based key-insulated signatures.