General and Efficient Certificateless Public Key Encryption Constructions
General and Efficient Certificateless Public Key Encryption Constructions
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DOI：
10.1007/978-3-540-73489-5_6
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发表时间：
2007-07
期刊：
影响因子：
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通讯作者：
Zhaohui Cheng;Liqun Chen;Li Ling;R. Comley
中科院分区：
文献类型：
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作者：
Zhaohui Cheng;Liqun Chen;Li Ling;R. Comley
2003年，Al-Riyami和Paterson提出了一种新的公钥加密范式，称为无证书公钥加密（Certificateless Public Key Encryption，CL-PKE），它与基于身份的加密（Identity-Based Encryption，IBE）一样是无证书的，同时与基于身份的加密不同，但类似于基于证书的加密，是无密钥托管的。本文在对已有的IBE方案和PKE方案进行启发式观察的基础上，提出了一种构造CL-PKE方案的一般方法，该方法利用IBE方案、Diffie-Hellman型密钥建立算法和安全散列函数的简单组合。根据这种方法，我们构造了两个有效的具体CL-PKE方案，并在随机预言模型下形式化分析了它们的安全性。
In 2003, Al-Riyami and Paterson introduced a new public key encryption paradigm called Certificateless Public Key Encryption (CL-PKE), which like Identity-Based Encryption (IBE) is certificatefree, and meanwhile which unlike IBE but similar to certificate-based encryption is key-escrow-free. In this paper, based on a heuristic observation on some existing IBE schemes and PKE schemes, we propose a general approach to build a CL-PKE solution, which makes use of a simple combination of an IBE scheme, a Diffie-Hellman type key establishment algorithm and a secure hash-function. Following this approach we construct two efficient concrete CL-PKE schemes and formally analyse their security in the random oracle model.