The prosperity of Internet of Things (IoT) has brought numerous advantages to individuals and organizations. Since the transmission channel is usually considered as untrusted, the notion of signcryption seems to be the desired method to ease the defect. Nevertheless, this primitive inevitably faces the new obstacle that how to search the required data without decrypting it. Therefore, inheriting the excellence of signcryption and equality test, we present a heterogeneous signcryption protocol supporting the equality test from public key infrastructure (PKI) to certificateless cryptosystem (CLC) toward IoT environment (PK-CLET). In this way, the introduced construction not only preserves the integrity, confidentiality and unforgeability of data, but also allows the cloud server to perform the equality test on different ciphertexts. Moreover, the security of PK-CLET as well as the performance evaluation are both shown that it is more suitable for IoT.

中文翻译：

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异构签密方案支持从PKI到CLC到IoT的平等测试

物联网 (IoT) 的繁荣为个人和组织带来了诸多优势。由于传输通道通常被认为是不可信的，签密的概念似乎是缓解缺陷的理想方法。尽管如此，这个原语不可避免地面临着如何在不解密的情况下搜索所需数据的新障碍。因此，继承签密和等式测试的优点，我们提出了一种异构签密协议，支持从公钥基础设施（PKI）到无证书密码系统（CLC）到物联网环境（PK-CLET）的等式测试。这样，引入的构造不仅保留了数据的完整性、机密性和不可伪造性，而且还允许云服务器对不同的密文进行相等性测试。而且，