Open-source intelligence (OSINT) involves finding, selecting, and acquiring information from publicly available sources and analyzing it to produce actionable intelligence. The techniques described are the order of the day for those who work in research. Social media and search engines are the main techiniques to gather information from public and private sources. Tools such as PasteLert are a must for the admin to set up alerts and pastebin search (like Google Alerts) for pastebin.com entries. Another interesting tool is the Reputation Management Search Engine called SamePoint.”]
Source: https://securityaffairs.co/wordpress/1012/hacking/osint-and-the-mine-called-internet-how-to.html