Bluetooth Keyboard Security: A Guide

TL;DR

Bluetooth keyboards are convenient but can be security risks. This guide shows you how to pair them safely, protect against eavesdropping, and keep your information secure.

1. Pairing Your Keyboard Securely

1. Use the Official Pairing Mode: Always follow the manufacturer’s instructions for putting your keyboard into pairing mode. This usually involves holding a specific button combination until an indicator light flashes.
2. Scan for Devices Carefully: On your computer or phone, scan for Bluetooth devices only when you are actively trying to connect your keyboard. Don’t leave scanning on constantly.
3. Verify the Device Name: Before connecting, double-check that the device name displayed matches your keyboard’s model number. A fake name could indicate a malicious device attempting to pair.
4. Remove Old Pairings: Regularly remove old or unused Bluetooth pairings from your devices. This reduces potential attack surfaces. On Windows:

   Settings > Devices > Bluetooth & other devices > More Bluetooth options > Remove device

   On macOS:

   System Preferences > Bluetooth > Right-click the keyboard > Remove

   On Android:

   Settings > Connections > Bluetooth > Tap the settings icon next to your keyboard > Unpair

2. Protecting Against Eavesdropping

1. Be Aware of Your Surroundings: Bluetooth signals have a limited range (typically around 10 meters), but can be intercepted. Avoid pairing or using your keyboard in public places where others might be listening.
2. Consider Encryption: Most modern Bluetooth keyboards use encryption, but it’s worth checking the specifications of your device to confirm. Look for support for AES-128 or higher.
3. Disable Bluetooth When Not In Use: The simplest way to prevent eavesdropping is to turn off Bluetooth on your device when you’re not using your keyboard.

3. Keeping Your Information Secure

1. Avoid Typing Sensitive Information on Public Networks: Never type passwords, credit card numbers, or other sensitive data while connected to a public Wi-Fi network with a Bluetooth keyboard. Use a wired connection whenever possible in these situations.
2. Keep Your Devices Updated: Regularly update your computer’s operating system and any associated Bluetooth drivers. These updates often include security patches that address vulnerabilities.
3. Be Wary of Firmware Updates for the Keyboard: Only install firmware updates from the keyboard manufacturer’s official website or app. Avoid suspicious downloads.
4. Use Strong Passwords & Multi-Factor Authentication: This isn’t directly related to the keyboard, but it’s a crucial layer of security. Even if someone intercepts your keystrokes, strong passwords and MFA make it harder for them to access your accounts.

4. Advanced Security Considerations

1. Bluetooth Keyloggers: Be aware that malicious Bluetooth devices can act as keyloggers. Regularly scan your devices with reputable anti-malware software.
2. MAC Address Filtering (Advanced): Some operating systems allow you to filter Bluetooth connections based on MAC address. This is a more advanced technique, but it can help prevent unauthorized devices from connecting.