• manoj kumar

To serve the purpose of user authentication for network security, many strong password authentication schemes have been proposed. W. C. Ku also proposed a hash based strong password authentication scheme and claimed that the proposed scheme withstands to all possible security attacks. In this paper, we analyzes W. C. Ku’s scheme and proved that the proposed scheme does not support essential security requirements. In addition, in W. C. Ku’s scheme, the remote user is not able to change his/her password freely. This paper also show that proposed scheme is still vulnerable to inside attack, man in the middle attack, password guessing attack, replay attack, impersonation, stolen verifier attack and denial of service attack.

Keywords: Login, server, access system, mutual authentication, session key, network security.

"Some Remarks on the Security Vulnerabilities of a Hash Based Strong Password Authentication Scheme", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.430-433, June-2019, Available :http://www.jetir.org/papers/JETIR1906C71.pdf

"Some Remarks on the Security Vulnerabilities of a Hash Based Strong Password Authentication Scheme", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp430-433, June-2019, Available at : http://www.jetir.org/papers/JETIR1906C71.pdf