I want to understand the risk in reusing complex password.
- Unique complex passwords for each and every email account, say 3.
- All other accounts, bank, medical, social, share a complex password, 1
- This makes a total of 4 passwords.
LinkedIn account gets hacked, emails and passwords are lifted.
How does this affect security of other bank, medical, and social sites?
Note as an aside, many financial sites limit passwords to alphanumeric, still!