Van Eck phreaking

Van Eck phreaking is when people try to spy on other persons' computer or phone screens using radio waves. Think of radio waves like invisible strings that move around everywhere, even through walls. When you use your computer or phone, it produces these radio waves that carry your private information like passwords and messages. Van Eck phreakers use equipment to capture these signals and decode the information on them, allowing them to spy on what you're doing on your device.
To prevent this, you can use special filters that block the radio waves or make it harder for phreaking devices to pick up the signals. These filters are like shields that protect your information from being stolen by bad guys.