Cryptanalysis of Identity Transmission Authentication System

Recently, Shm et al. introduced the efficient identity-typed transmission authentication scheme relied on some system in order to reach security properties in wireless sensor networks. They claim that their system can attain security properties and alleviated denial-of-service attack by preventive the times of signature verification nonsuccess in wireless sensor networks. But, we discovered that a scheme does not achieve the security requirements as they claimed. We will show that in this paper.