Multi-authority attribute encryption scheme based on cloud computing verifiable outsourcing decryption

With the advancement of mobile device technology, network communication has become more common and convenient. However, due to the limitations of mobile terminals in terms of processing power and storage space, the performance is significantly limited, especially when performing complex computing tasks. Cloud computing technology allows users to access the required computing power through the Internet by integrating a large number of computing resources. Security issues in th is field, especially on access control, have become the focus of public and expert attention. Aiming at the verification requirements in the process of data outsourcing decryption, this paper designs a new multi-authorization attribute encryption scheme that supports outsourcing decryption verification. In the encryption phase, pre-encryption is performed using an offline device, significantly reducing the time required for online encryption. In the decryption phase, complex computing tasks are delegate d to a cloud service provider, and a verifiable outsourced decryption method is employed to unravel the ciphertext. Compared with other encryption schemes, this scheme can reduce the computing burden of users, speed up the decryption speed through verifiable outsourcing decryption, and ensure the accuracy of cloud server decryption.