National Tsing Hua University
Recently, the researcher proposed an efficient identity-based broadcast authentication scheme based on Tso et al.'s IBS scheme with message recovery to achieve security requirements in wireless sensor networks. They claim that their scheme can achieve security requirements and mitigated Denial-of-Service (DoS) attack by limiting the times of signature verification failures in Wireless Sensor Networks (WSN). However, the authors found that the scheme cannot attain the security level as they claimed. They will demonstrate it in this paper.