Some messages sent by Android are completely incomprehensible to ordinary people. Have you ever received a notification asking you to authorize a DUN Bluetooth connection? Wondering if this is a sign that your smartphone has been hacked? We explain everything about Bluetooth Dial-Up Networking (DUN) technology..
What is Bluetooth DUN?
As you know, hackers don't just attack computers. Phones and especially Android devices have become in a few years a target of choice for hackers. It must be said that the astronomical amount of personal data stored in these small devices is enough to whet the appetite of cybercriminals.
Diary, personal photos, social networks, address book, messaging, bank accounts, today we can no longer count the number of services that we manage exclusively using our phone. Hacking his smartphone (virus, malware) can have disastrous consequences on his life..
We must therefore remain vigilant and watch for any sign that may indicate the presence of a hacker. Bluetooth like any wireless connection technology exposes the smartphone to any type of attack. I advise you to read this article: why should you be afraid of public Wi-Fi access points?
Have you ever been surprised to see a notification appear on your phone screen asking you to authorize a DUN Bluetooth connection? This phenomenon is not surprising. It usually happens when you activate your smartphone's Bluetooth connection near your computer.
What is the Bluetooth Dial-Up for
Bluetooth is now present on all smartphones and PC computers. This Bluetooth technology has different profile modes in order to communicate wireless devices..
- File Transfer Profile: allows you to exchange files between two devices
- Cordless Telephony Profile: this profile allows you to make telephone calls via a computer
- Basic Printing Profile: Provides the ability to initiate wireless remote printing to a compatible printer
- Phone Book Access Profile: allows you to access the phone book on your phone (headset or car).
To all this is added the Bluetooth Dial-Up Network also called DUN. This profile offers the possibility of connecting a telephone to a computer in order to provide it with internet access (4G or 5G). The smartphone is thus transformed into a wireless modem.
This device is particularly interesting when you want to connect a computer to the Internet in an area without a Wi-Fi network. However, today a much more efficient method is used, called connection sharing (in Wi-Fi or in USB).
Either way, you should never accept a DUN Bluetooth connection request when your phone tries to connect to a computer other than yours. Hackers may be trying to use your internet connection.
Remember that Bluetooth has a limited range (around 10 meters). Attacks are therefore relatively rare. In addition, the system has protection at the communication channel level. Concretely, this means that the two devices exchange a public key. But we still have to keep our eyes open.
