2013/12/07 by Vorugunti Chandra Sekhar, Sekhar, Vorugunti Chandra, Mrudula Sarvabhatla +1
Computer Science · #Advanced Authentication Protocols Security #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #User Authentication and Security Systems #cs.CR
paper · pdf · doi:10.48550/arxiv.1401.6121
arxiv created 2013/12/07 · openalex publication_date 2013/12/07 · arxiv updated 2014/01/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In 2013, Tsai et al. cryptanalyzed Yeh et al. scheme and shown that Yeh et al., scheme is vulnerable to various cryptographic attacks and proposed an improved scheme. In this poster we will show that Tsai et al., scheme is also vulnerable to undetectable online password guessing attack, on success of the attack, the adversary can perform all major cryptographic attacks. As apart of our contribution, we have proposed an improved scheme which overcomes the defects in Tsai et al. and Yeh et al. schemes.