LLRX> Deep Web Research and Discovery Resources 2019
https://www.llrx.com/2019/01/deep-web-research-and-discovery-resources-2019/

How big is the Deep Web? It is estimated that the Deep Web comprises 7,500 terabytes – although an exact size is not known, and figures vary widely on this question. The magnitude, complexity and siloed nature of the Deep Web means researchers cannot turn to one specific guide or one search engine to access the vast range of information, data, files and communications that comprise it. The ubiquitous search engines (Google, Bing, Yahoo) manage, index and deliver results from the Surface web. These search results include links, data, information, reports, news, subject matter content and a large volume of advertising that is optimized to increase traffic to specific sites and support marketing and revenue focused objectives. On the other hand, the Deep Web – which is often misconstrued as a repository of dark and disreputable information [Note – it is not the Dark Web], has grown tremendously beyond that characterization to include significant content on a wide range of subject matter covering a broad swath of files and formats, databases, pay-walled content as well as communications and web traffic that is not otherwise accessible through the surface Web. In the last several years many more applications, tools and techniques have become available that provide researchers with targeted access to specific portions of the Deep Web using discovery techniques that leverage algorithms to access data and information in many formats. Documents used by organizations and entities to communicate within their domains, including databases and files of information that may be password protected and encrypted communications, may also be accessible. Searching for this information requires that users apply search engines, techniques and search tools that function as a means of accessing these repositories of corporate, data, news and research that is not transparent using the Surface web activities. Searching the Deep Web requires the use of multiple techniques and resources – it is challenging, complicated and far less straight forward than just using Google, and much more time consuming as well. This guide providers researchers with an extensive range of sites, services, resources, tools and techniques from which to choose so as to target their efforts to locate and then utilize information and data from within the Deep Web. In addition, this guide assists researchers to identify and implement security and privacy applications while using the Deep Web, as well as offering a large number of training and learning resources to conduct more effective and efficient searches. This Deep Web Research and Discovery Resources 2019 report and guide is divided into the following topics: a) Articles, Papers, Forums, Audios and Videos; b) Cross Database Search Services; c) Cross Database Search Tools; d) Peer to Peer, File Sharing, Grid/Matrix Search Engines; e) Presentations; f) Resources – Deep Web Research; g) Resources – Semantic Web Research; and h) Bot and Intelligent Agent Research Resources and Sites. This report is also available as a PDF directly from http://www.DeepWeb.us/.