  Bluetooth is a communication technology used to wirelessly exchange data
between devices. In the last few years there have been found a great number of
security vulnerabilities, and adversaries are taking advantage of them causing
harm and significant loss. Numerous system security updates have been approved
and installed in order to sort out security holes and bugs, and prevent attacks
that could expose personal or other valuable information. But those updates are
not sufficient and appropriate and new bugs keep showing up. In Bluetooth
technology, pairing is identified as the step where most bugs are found and
most attacks target this particular process part of Bluetooth. A new technology
that has been proved bulletproof when it comes to security and the exchange of
sensitive information is Blockchain. Blockchain technology is promising to be
incorporated well in a network of smart devices, and secure an Internet of
Things (IoT), where Bluetooth technology is being extensively used. This work
presents a vulnerability discovered in Bluetooth pairing process, and proposes
a Blockchain solution approach to secure pairing and mitigate this
vulnerability. The paper first introduces the Bluetooth technology and delves
into how Blockchain technology can be a solution to certain security problems.
Then a solution approach shows how Blockchain can be integrated and implemented
to ensure the required level of security. Certain attack incidents on Bluetooth
vulnerable points are examined and discussion and conclusions give the
extension of the security related problems.
