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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用于工业物联网的带关键字搜索的无证书公钥认证加密


工业物联网（IIoT）融合各类智能终端、移动设备和通信技术，使传统工业向智能工业升级。工业物联网依靠云计算强大的数据处理能力，根据用户的需求降低各种按需服务的成本。然而，在这种环境下，外包数据的隐私和机密性应该受到保护，因为数据通常由第三方服务提供商“处理”。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”解密特性，限制了数据检索。为了将加密应用于保护隐私的数据检索，文献中已经提出了许多带有关键字搜索系统的公钥加密技术。然而，大多数现有方案都容易受到内部关键字猜测攻击（IKGA），这是由关键字空间较小引起的。为了解决这个问题，我们提出了一种带有关键字搜索方案的无证书公钥认证加密方案，该方案可证明针对 IKGA 是安全的。对所提出方案的性能分析表明，与其他带有关键字搜索的无证书公钥加密方案相比，该方案更加安全有效。