An attacker nearby could see these requests and pretend to be your hidden access point, forcing your device to connect to a compromised access point. In fact, it can actually make your devices less secure because they’ll attempt to connect to the hidden Wi-Fi network at all times. This is why hiding your wireless network won’t help you. This tool isn’t even really necessary, as monitoring a network for an extended period of time will naturally result in the capture of a client attempting to connect, revealing the SSID. The device will then attempt to connect to the network again, and it will do so using the network’s SSID. Attackers can send a deauth frame to a device, which is the signal an access point would send if it were shutting down. The wireless network’s SSID, or name, will be displayed as blank in many of these tools. It’s possible to find “hidden” wireless networks with tools like Kismet, which show nearby wireless networks. RELATED: Don't Have a False Sense of Security: 5 Insecure Ways to Secure Your Wi-Fi Anyone within range of your network can capture this sensitive data - yet another reason to not operate an open Wi-Fi network.
They captured some packets from open Wi-Fi networks, and those could contain sensitive data. Google took some heat for this when they were capturing Wi-Fi data with their Street View trucks. Any HTTPS connections will be protected from this, but all HTTP traffic will be vulnerable. The attacker could then inspect these packets and see what you’re doing online. This is generally known as putting the device in “promiscuous mode,” as it captures all nearby wireless traffic. Anyone within range can use packet-capturing software that activates a laptop’s Wi-Fi hardware and captures the wireless packets from the air. When a network is unencrypted, traffic travels back and forth in plaintext.
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