do you mean the application site?
The link on the sony site goes to
https://app.firstusa.com/blah....
It is encrypted with SSL. The certification for app.firstusa.com is assigned to JPMorgan Chase. It is issued by VeriSign, Inc. They are one of the main issuers of certifications. It is not impossible to fake SSL certifications but to my understanding you have to hack my box to place the fake Certification Authority (VeriSign) cert to make it work.
I would trust this deal. They just want to get people in more debt haha.
this is just my 2 cents.