Lattice Cryptography based Geo-encrypted Contact Tracing for Infection
Detection
- Mayank Dhiman ,
- Nitin Gupta ,
- Ujjawal Gupta ,
- Yashwant Kumar
Abstract
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.