Recently a bureaucrat who wanted to make a mass protest out of his criticism of Indian Election Commission's drive to remove voters, was picked up by Indian Police and his Signal metadata was accessible to the Police. What is the solution to this thing?

His interview does not tell us if it was metadata or actual calls that were surveilled which could point to device compromise too.

"What caught him by surprise, he told ThePrint, was the Special Cell officers' access to his calls made via Signal"

https://theprint.in/india/ex-civil-servant-ashish-joshi-reca...