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为了保护基于身份加密方案中用户的个人隐私,基于素数阶群,使用非对称双线性映射,提出了匿名的基于身份加密方案,实现了数据保密性和接收者的匿名性,攻击者从密文不能得到接收用户的身份.方案基于决策双线性Diffie-Hellman(DBDH)困难问题假设,在标准模型下的适应性身份攻击模型中可证安全.与合数阶群中的方案相比,素数阶群中方案的计算代价大大降低,因此所提方案同时提高了基于身份匿名加密方案的安全性和实现效率.
In order to protect the privacy of users in identity-based encryption schemes, anonymized identity-based encryption scheme is proposed based on prime order bins and asymmetric bilinear mappings to achieve data confidentiality and receiver’s anonymity. We can not get the identity of the receiving user.The scheme is based on the assumption that the problem of bilinear Diffie-Hellman (DBDH) is difficult to solve, and it is proved that the adaptive identity attack model in the standard model can be applied to security.Compared with the solution of the complex number group, Therefore, the proposed scheme improves the security and efficiency of identity-based anonymous encryption scheme at the same time.