Although the hack didn't breach the mobile payment app itself, consumer confidence may be shaken.
McAfee found that 60 percent of 504 surveyed IT professionals prioritize security as the primary driver of network design.
A recent Gallup Crime poll indicates that Americans' top two worries revolve around having credit card data stolen or their computer or smartphones compromised.
Gottfrid Svartholm Warg was found guilty of hacking an IT service provider in Denmark. This is his second court case for illegally accessing data.
The guidance, developed by a PCI Special Interest Group, will help merchants educate staff on protecting cardholder data.