Security firm Digital Shadows has realized a search engine for the Deep Web that sucks in pages in real time The deep web is the part of the world wide web not indexed by common search engines. It represents almost all of the content available on the Internet. The company developed the search engine to offer its services to private firms to help them identifying cyber threats or any other illegal activity that could represent a threat. The system is running all the time, but its directed by humans.”]
Source: http://securityaffairs.co/wordpress/34618/security/search-engine-deep-web.html