What is the advantage and disadvantage of single sign on SSO?

Related questions

1. What is SSO cookie?
2. What is the advantage of using a single sign on solution?
3. What is SSO software?
4. What is the use of SSO?
5. How does SAML SSO work?
6. What is ADFS SSO?
7. What is SAML 2.0 SSO?
8. What is the difference between SSO and LDAP?
9. What is seamless SSO?
10. How does Google do SSO?

Tags

1. #problems
2. #backup
3. #password
4. #always
5. #highly
6. #smart
7. #stronger
8. #disadvantages
9. #vulnerability
10. #cards
11. #tokens
12. #critical
13. #authentication
14. #privacy
15. #lacking