At least 45.7 million credit and debit cards were compromised over several years. The biggest credit-card hacking incident in history exploited a weakness in wireless network security. Financial institutions need intrusion detection systems that incorporate wireless networks. The ability of consumer devices such as phones and laptops to pick up wireless communications traffic through proximity to local network access points has upped the ante for network security. Because WiFi signals can be picked up by proximately-located devices, any data that’s traveling wirelessly is fair game for attackers.”]
Source: https://www.cuinfosecurity.com/wireless-weak-link-in-network-security-a-466