Corrections to “On the Security of a Revocable Cross-Domain Anonymous Authentication in IIoT”

With the rapid growth of the Industrial Internet of Things (IIoT), secure and efficient collaboration among devices from different domains is essential for achieving collaborative production tasks. Recently, Zeng et al. proposed a dynamic group signature scheme using dynamic accumulators and zero-knowledge proofs. Although they claim that their scheme ensures unlinkability of signatures, our analysis shows that their scheme is vulnerable and fails to provide unlinkability. After presenting our attack, we analyze the underlying causes of these vulnerabilities and propose an improvement to address them.