Q: Was my personal data encrypted?
A: All of the data was protected, and access was restricted both physically and through the perimeter and security of the network. The entire credit card table was encrypted and we have no evidence that credit card data was taken. The personal data table, which is a separate data set, was not encrypted, but was, of course, behind a very sophisticated security system that was breached in a malicious attack.

from skimming the alleged chat logs of the hackers, it doesn't look like it was too sophisticated.