Over the last few years, chip-and-PIN has been heralded as the gold standard in payment security. These EMV credit cards come with embedded chips that are next to impossible to clone. To initiate an in-store payment, customers must input a personal identification number (PIN) that only they know. Additionally, mobile payments and wearable technologies continue to grow in popularity every year. In fact, experts predict that annual in-store sales generated through smart devices could exceed $500 billion by 2020 — in the United States alone.