Transstellar Journal Publications and Research Consultancy Private Limited (TJPRC)
Among the many branches of security, authentication and confidentiality are very important to be provided. Authentication focuses on the authentication system supported by Windows 2000 family, especially Kerberos and NTLM. From the results of this paper, some unconvincing points are found that are considered as weaknesses, such as being subject to offline dictionary attacks and lack of perfect forward secrecy. Some protocols are chosen to build an authentication system that takes into consideration and observations on Windows 2000 systems.