Sony has implemented a new 2-step verification system for PSN users, adding a whole new layer of security.
“Passwords can be compromised if you use the same password for multiple accounts, click on malicious links, open phishing emails and other methods. If your password is compromised and becomes known to someone other than yourself, your account will still require a verification code to gain access when you activate 2-Step Verification.”
This new system works by asking users to enter their account password when logging in, but also a verification code which is sent to your phone via text. Unless you manually log out, you wont have to do this every time you use your
If you want to set up the service, simply head over to this link and follow the instructions on-screen.