Is Identity Safe...safe?

Hi everybody. I am a happy user of NIS 09 and I use Identity Safe to login in my favorite sites but so far I hesitate to use it for my Internet Banking and PayPal accounts. Instead, I use the KeyScrambler Firefox add-on which encrypts keystrokes. I wonder if I should use Identity Safe for them too. What is the encryption method that Identity Safe is using and is it completely...safe?