An improved redactable signature-based public auditing scheme for the COVID-19 cloud data

Li et al. in 2022 proposed a public cloud storage auditing scheme that supports sensitive data storage and editable signatures. Their scheme is illustrated with an example of cloud storage service in healthcare application. In this paper, we point out that the data block authentication tags in their scheme can be forged. We have designed a COVID-19 cloud data sharing public cloud storage auditing scheme based on redactable signatures in the context of COVID-19 cloud data. Finally, we gave a security analysis on how to enhance it to be more secure.