Those systems don't leave credit card numbers, expiration dates and other personal information vulnerable in the same way that traditional credit cards with just a magnetic stripe do, said Eric Friedberg, co-founder of digital forensics firm Stroz Friedberg.
"It's essentially encrypted," said Friedberg, a former cybercrime prosecutor. "And the attackers, even if they capture it, they can't do anything with it. So those things are much more secure than just the magnetic stripe cards."
Mobile payments are expected to account for $8.71 billion in transactions in 2015, according to a study by eMarketer. In 2016, the number could reach $27.05 billion, the firm estimates.