That means buying a computer with a credit card (which is tied to your identity) makes it possible to link your purchase to a unique MAC address. Your MAC address can reveal your identityĬomputer manufacturers keep a list of the MAC addresses corresponding to all the devices they've built. If you sit down at a cafe with your laptop and you have WiFi enabled, the laptop will broadcast its MAC address as it searches for a WiFi network. Laptops usually have two, one that is visible when it connects to WiFi, and another when you plug in an Ethernet cable. Each device (laptop, phone, smart watch, printer) is assigned a MAC address when it is manufactured. What is a MAC address?Ī MAC (media access control) address, is a unique series of letters and numbers (for example, A1-B2-CD-34-5E-6F) that identifies a computer when connecting to a network. Doing so is particularly useful if you use your device in public places like libraries and airports. If you want to increase your anonymity online, then changing your device's MAC address can help.
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