Abstract
With the rapid development of information technology and the continuous upgrading of special equipment, such as sensing and control, the application of industrial Internet of Things (IIoTs) has received great attention. Within the IIoTs, a large amount of sensitive data needs to be transmitted in time. Therefore, protecting data security and user privacy has been a key issue. In this article, the concept of public key anonymous aggregation encryption (AAE) is proposed for the first time. The sender of the message encrypts $n$ different messages into one ciphertext using the public keys of $n$ different receivers. After receiving the ciphertext, the receiver decrypts the ciphertext using his private key to get the corresponding message. The messages obtained by different receivers are different, and the identity of the receiver is kept secret to anyone including other receivers. A concrete AAE scheme then is constructed, which is proved to be secure in the standard model based on the decisional Diffie–Hellman problem. It does not require pairing operations, so it is more efficient than previous public encryption schemes and is more suitable for IIoTs.
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