In general, ID-based proxy reencryption (IBPRE) includes data transfer in a 1 : 1 manner between a sender and receiver. Therefore, only the data owner has the authority to decrypt or reencrypt the data that is encrypted with his/her public key. However, in an environment with data self-sovereignty, such as an enterprise IoT-cloud environment, the data are directly managed by cloud once data is uploaded from user-controlled IoT devices. In such a situation, there is no way of sharing data if the data owner has no access over the data due to being outside the workplace and other issues. In this study, to solve this problem, data can be shared even when the data cannot be accessed by delegating the authority of the data owner to generate the reencryption key to other users. In addition, by solving the security threats that may appear in this process, data sharing can be performed securely and efficiently in the corporate environment.

中文翻译：

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企业物联网-云存储环境的基于组委派的基于 ID 的代理重新加密

通常，基于 ID 的代理重新加密 (IBPRE) 包括在发送方和接收方之间以 1:1 的方式传输数据。因此，只有数据所有者才有权对使用他/她的公钥加密的数据进行解密或重新加密。但是，在具有数据自主权的环境中，例如企业物联网-云环境，一旦数据从用户控制的物联网设备上传，数据就会直接由云管理。在这种情况下，如果数据所有者由于不在工作场所等原因无法访问数据，则无法共享数据。在本研究中，为了解决这个问题，通过将数据所有者的权限委托给其他用户来生成重加密密钥，即使在数据无法访问的情况下也可以共享数据。另外，通过解决这个过程中可能出现的安全威胁，