Industrial Internet of Things (IIoT) integrates various types of intelligent terminals, mobile devices, and communication technologies to enable the upgrade of traditional industries to intelligent industries. IIoT relies on the powerful data processing capabilities of cloud computing to reduce the cost of various on-demand services as per the requirements of users. However, the privacy and confidentiality of the outsourced data should be protected in this environment because the data are typically “handled” by a third-party service provider. An encryption technique can guarantee the confidentiality of the data but it limits data retrieval due to its innate “all-or-nothing” decryption feature. To apply encryption to privacy-preserving data retrieval, many public key encryption techniques with keyword search systems have been proposed in the literature. However, most of the existing schemes are vulnerable to inside keyword guessing attack (IKGA), which is caused by a small keyword space. To address this problem, we propose a certificateless public key authenticated encryption with keyword search scheme, which is provably secure against IKGA. A performance analysis of the proposed scheme demonstrates that it is more secure and effective compared with other certificateless public key encryption with keyword search schemes.

中文翻译：

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利用关键字搜索进行工业物联网的无证书公钥认证加密

工业物联网（IIoT）集成了各种类型的智能终端，移动设备和通信技术，以使传统产业升级为智能产业。IIoT依靠云计算强大的数据处理功能来根据用户需求降低各种按需服务的成本。但是，在这种环境下，应该保护外包数据的隐私和机密性，因为数据通常是由第三方服务提供商“处理”的。加密技术可以保证数据的机密性，但由于其固有的“全有或全无”解密功能，因此限制了数据检索。要将加密应用于保存隐私的数据，文献中已经提出了许多利用关键字搜索系统的公共密钥加密技术。但是，大多数现有方案都容易受到内部关键字猜测攻击（IKGA）的攻击，这是由较小的关键字空间引起的。为了解决这个问题，我们提出了一种使用关键字搜索方案的无证书公钥身份验证加密，可证明对IKGA是安全的。对该方案的性能分析表明，与采用关键字搜索方案的其他无证书公钥加密相比，该方案更加安全有效。事实证明，它对IKGA是安全的。对该方案的性能分析表明，与采用关键字搜索方案的其他无证书公钥加密相比，该方案更加安全有效。事实证明，它对IKGA是安全的。对该方案的性能分析表明，与采用关键字搜索方案的其他无证书公钥加密相比，该方案更加安全有效。