Bluetooth technology ?

Bluetooth technology has enabled the spread of the IoT and adds a lot of convenience. Are there cautions or considerations one should take when using Bluetooth technology? Are there ways for you to secure your Bluetooth connectivity? How would someone see your Bluetooth activity on their device? You should also explain how and where you use Bluetooth networking.






Bluetooth is a great, very impressive wireless technology that enables data exchange between mobile and fixed devices over short distances. The system uses UHF frequencies in the ranges of 2.402 GHz to 2.480 GHz.

Frequency-hopping spread spectrum is the radio technology used by Bluetooth. Data is divided into packets and transmitted on one of 79 Bluetooth channels. These channels have a 1 MHz bandwidth. It has also changed how we use devices in the New IoT world we live in, but it also has huge security implications.

The more advanced the technology, like Bluetooth 5.0, the more secure it is, but all of these versions (1.0 to 5.0) can still be compromised if proper security measures are not taken.


Turning it off is a great way to keep it secure while you're not using it! Bluesnarfing occurs when a hacker can pair with your Bluetooth device without your knowledge and steal or compromise your personal information. If you don't use your Bluetooth device, turn it off. That one detail can help a lot as it seems to be one of the easier ways for someone to get in especially if your device is not the newest device.


Once they have infiltrated your device, hackers can still use eavesdropping and DOS attacks to cause your device to crash and deny you services such as messaging and calling. Even receiving emails can be blocked on your phone, your battery drained, etc. Logical Link Control and Adaption Protocol (L2CAP) enables connectionless and connection-oriented services on top of the Bluetooth stack. This layer can be used to transfer an oversized packet to Bluetooth-enabled devices, via stander tools like I2ping that come with Linux Bluex utlis resulting in dos attacks.


Many items use Bluetooth technology, including but not limited to connecting smartphones to a smart speaker, computing devices to car stereos and subsystems now, Bluetooth mice and keyboards to a PC, some external monitors, and voice calls via headphones and other wireless speakers. It’s used all world, so and Bluetooth versions really matter as the security might not be the best. Case and point the first versions of Bluetooth devices can pair with any Bluetooth device, regardless of version or level, without requiring owners to verify their identity. It is therefore the most dangerous device in terms of security.


Depending on the environment, Bluetooth ranges can vary from 10 meters to 100 meters. So one plus is that you don't have to worry about some remote hacker, but don't think you should just leave Bluetooth devices on all day sending those beacons out. Like with wifi, if your Bluetooth is on, it's sending a signal over UHF frequencies, and if you have paired devices like a cell phone, for example, Apple’s airdrop uses Bluetooth to create a peer-to-peer Wi-Fi network between the devices. Hence, AirDrop does not require any kind of connection to the internet or router. Wireless and Bluetooth, however, are required. The data you transfer could be intercepted if properly hacked and looked for because of a low-level Bluetooth security issue.



NFC vs. bluetooth: What are the 5 key differences? Nortech Control Blog. (n.d.). Retrieved February 22, 2022, from https://blog.nortechcontrol.com/nfc-vs-bluetooth


Alina.bolton. (2020, April 20). The top 5 bluetooth security vulnerabilities. GlobalSign GMO Internet, Inc. Retrieved February 22, 2022, from https://www.globalsign.com/en/blog/top-5-bluetooth-security-vulnerabilities


Nations, D. (2021, September 22). What is airdrop and how does it work? Lifewire. Retrieved February 22, 2022, from https://www.lifewire.com/what-is-airdrop-how-does-it-work-1994512