If you know the history of PSN's security (or the lack of it), this might be worth a look. Two-step authentication can now be set up for your PSN account, and here's how:
1. Go to http://account.sonyentertainmentnetwork.com/
and log in to your account
2. Go to the Account tab, then Security on the sidebar - you'll see something like "For 2-Step Verification, please visit this page."; click this.
3. Then just add your mobile number and follow the steps.
I already removed my card details from my account after the last exploit, so I'm all for this.