Security issues of single sign on web services

Internet plays a main role in our life as our whole life revolves around the internet it become too hard for us to imagine our life without internet. As the use of internet increase the security for all types of data also increases. Early days these securities was provided with the authentication process via password, but now a days use of traditional authentication process is more risky for accessing the requirement of todays distributed user. Single sign on has security and user benefits. It reduces the cost too. SSO allows a user to use a single account to access multiple functions provided within that website. However, security is at greater risk if user are providing data for any of weak website then our secret credentials will be at risk. Many algorithms are used to find out what all flaws are present in web services which helps many companies to improve their services & security.