It is a set of Internet content that is not directly accessible by the search portals. This includes, for example, documents hosted within websites that require login and password. Far from public surveillance, this huge secret area (500 times larger than the common web) was transformed into a land without law, full of dreadful illegal activities. Deep Web urls can be very bizarre, like a sequence of letters and numbers followed by the .onion suffix, instead of the traditional .com. Originally, its function was positive: to protect confidential information of governments, banks, companies, military force and universities. However, today you can find everything on the Deep Web, such as virtual drug stores, child pornography and terrorist connections for arms sales. As there is no control over these sites, the police and governments can not do anything. In addition, these sites are full of crackers (hackers with criminal intentions), and can not be accessed by a common server, you need another type of browser more sophisticated.
