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IBE(基于身份的加密)

于 2022-02-24 发布 文件大小:4.67 MB
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基于身份标识的加密算法 IBE 由Shamir于1984年首先提出。这种加密算法的基本思想是公钥可以是任何唯一的字符串 ,如 email地址 、身份证或其他标志,它的优点是公钥是可识别的,不需要通常PKI系统的证书发放,同时可以以椭圆曲线形式实现该算法。IBE加密方案的安全性建立在CDH (Com puta-tional Diffie.Henman) 困难问题的一个变形之上,称之为BDH(Bilinear-Diffie-Hellm an)问题。IBE的核心是使用了超奇异椭圆曲线上的一个双线性映射(Weil pairing)。双线性映射是对修正后的Weil对和Tate对的总结和抽象,是第一个实用的IBE方案口]之所以成功的关键,因而在2001年后的大部分IBE方案中都得到了应用.

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