Certificate-based cryptosystem can not only resolve the private key escrow problem inherent in the identity-based cryptosystem but also reduce the cost of public key certificate management in the public key infrastructure-(PKI-) based cryptosystem. Provable data possession (PDP) can ensure the integrity of users’ data stored in the cloud at a very high probability. By combining these two concepts, we propose a certificate-based PDP scheme. We prove that our scheme is secure in the standard model assuming that the Squ-CDH problem is hard. Based on the index logic table, our scheme can be extended to support dynamic operations easily. Efficiency analysis shows that our scheme has high efficiency.

中文翻译：

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标准模型中基于证书的可证明数据拥有方案

基于证书的密码体制不仅可以解决基于身份的密码体制固有的私钥托管问题，而且可以降低基于公钥基础设施（PKI）的密码体制中公钥证书管理的成本。可证明的数据所有权（PDP）可以以非常高的概率确保存储在云中的用户数据的完整性。通过结合这两个概念，我们提出了基于证书的 PDP 方案。我们证明我们的方案在标准模型中是安全的，假设 Squ-CDH 问题很困难。基于索引逻辑表，我们的方案可以轻松扩展以支持动态操作。效率分析表明，我们的方案具有较高的效率。