Elliot Alderson is a hacker. He/she claims to be a French security researcher in medium.com. He/she tested Aaarogya Setu and clarified the facts better than anyone else.
There are an estimated six lakh rogue or unregistered and unregulated UAVs in India, and security experts say every single one of them is a potential hazard. There is an urgent need to invest in R&D to develop new and effective counter-UAV systems.