What is the lowest significant level of security for the personal devise user, at present?

By present the last couple years and were the next years is going. In terms of a single person considering their lowest level signal to the internet using computing hard electronics, what is the smallest unit of information and input/output a person must have to maintain privacy and liberty under the a just law?

I was thinking a person must have control of a single I/O port and how it is made physically and used