A Survey on Password Security Systems
Password security is essential for user authentication on small networking system as well large networking system. Till today many researchers introduced various methods to protect passwords on network. Passwords are prone to various types of attacks like brute force attack, password reuse attack, password stealing attack, password cracking attack, etc. This paper gives review on different methods which were introduced for protection of password on a network. This paper also includes work done for protection of text passwords and graphical password, also described that how those methods are efficient. At the last oPass algorithm is described. oPass algorithm is user authentication protocol which uses Cellphone and short message service of user to avoid password reuse and password stealing attack.