Answer:
A hacker who goes through the garbage looking for information is engaging in "Dumpster Diving".
Explanation:
The rescue from giant residential, commercial, industrial and construction containers for unused items which are eliminated by their holders, but useful for the picker and the phenomenon is understood as "Dumpster Diving".
In order to describe people who collect recyclable materials for their deposit value are also called as "binner".
The diving for commodities like food, clothing, furniture and similar items in appropriate and working condition. Some individuals perform it due to necessity and poverty while many perform it systematically for profit as professionals.