  Controlling the spread of infectious diseases, such as the ongoing SARS-CoV-2
pandemic, is one of the most challenging problems for human civilization. The
world is more populous and connected than ever before, and therefore, the rate
of contagion for such diseases often becomes stupendous. The development and
distribution of testing kits cannot keep up with the demand, making it
impossible to test everyone. The next best option is to identify and isolate
the people who come in close contact with an infected person. However, this
apparently simple process, commonly known as - contact tracing, suffers from
two major pitfalls: the requirement of a large amount of manpower to track the
infected individuals manually and the breach in privacy and security while
automating the process. Here, we propose a Bluetooth based contact tracing
hardware with anonymous IDs to solve both the drawbacks of the existing
approaches. The hardware will be a wearable device that every user can carry
conveniently. This device will measure the distance between two users and
exchange the IDs anonymously in the case of a close encounter. The anonymous
IDs stored in the device of any newly infected individual will be used to trace
the risky contacts and the status of the IDs will be updated consequently by
authorized personnel. To demonstrate the concept, we simulate the working
procedure and highlight the effectiveness of our technique to curb the spread
of any contagious disease.
