The world has already witnessed many epidemic
diseases in the past years, like H1N1, SARS, and Ebola etc.
Now, Covid-19 has also been added to list, which is declared
as pandemic by World Health Organization. One of the most
commonly used method to tackle the spread of such diseases
is using mobile applications to perform contact tracing of the
infected person. However, contact tracing applications involve
transmitting sensitive location based data of the infected person
to the government servers. Therefore, recently this has raised a lot
of concerns regarding privacy of the infected persons. This work
proposes a light-weight and secure encryption scheme, based on
location based encryption which can be used to transfer the
location data to the server without compromising its security.
The main aim of the work is design an algorithm in such a way
that the encrypted transferred data can only be decrypted at
the server and in-between data leakage can be prevented. This
work proposes to use location based encryption combined with
Learning with Errors problems in Lattices, which can provide a
solution to privacy concerns in contact tracing, which will even
be applicable in the post quantum period.