Regular Updates: Firmware and OS updates often include security patches that address known Bluetooth vulnerabilities. Keeping devices updated is crucial for mitigating exploits.
Restricting to Trusted Paired Devices: This significantly reduces the attack surface. Many Bluetooth attacks rely on devices being discoverable or automatically connecting to unknown devices. By only allowing connections to pre-approved devices, the risk of unauthorized access is minimized.
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A) While enabling encryption is good practice, leaving devices in discoverable mode even briefly exposes them to potential attacks during that window. This approach doesn't prevent an attacker from initiating a pairing request and exploiting vulnerabilities during the pairing process itself.
B) This is a complex solution that doesn't guarantee improved security. Proprietary drivers could have their own vulnerabilities, and managing separate adapters adds administrative overhead. Disabling Bluetooth entirely is not a practical solution if Bluetooth functionality is required.
C) While these measures add layers of security, they are not widely available or standardized for most consumer devices. Implementing and managing such systems would be complex and costly for most organizations. Furthermore, multi-factor authentication for pairing is not a standard Bluetooth feature.
Therefore, focusing on regular updates and restricting connections to trusted paired devices offers the best balance of security and usability for minimizing the attack surface for Bluetooth exploits.