Improved data integrity audit scheme based on certificateless public key cryptography and its application in COVID-19 epidemic data management

With the continuous development and improvement of cloud computing and big data technology, the cloud audit has gradually become more and more important. For the huge data storage, how to carry out data integrity auditing in the edge environment is very critical. This paper studies and explores the data integrity auditing scheme based on certificateless public key cryptography in the edge environment, analyses the security flaws of a scheme proposed by Wang et al. (2021) in the signature generation process, and improves it. The security analysis shows that the new scheme can effectively resist the original attack and three types of adversary in certificateless cryptography, and the computational overhead is reduced in the auditing phase. Finally, we discuss its application in COVID-19 epidemic data management.