A review on techniques for optimizing web crawler results

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Reinforcement Learning in Deep Web Crawling: Survey

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  • Kapil Madan 19 &
  • Rajesh Bhatia 19  

Part of the book series: Advances in Intelligent Systems and Computing ((AISC,volume 1374))

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Context: Reinforcement learning (RL) can help in solving various challenges of deep web crawling. Deep web content can be accessed by filling the search forms rather than hyperlinks. Understanding the search form and proper selection of queries are necessary steps to retrieve the deep web content successfully. Thus, crawling the deep web is a very challenging task. The reinforcement learning-based technique helps in filling the search form and retrieving the deep web content successfully. RL selects the action based on the given state, and the environment assigns reward/penalty to the selected action. Objective: This study reports a survey of RL-based techniques applied in the domain of deep web crawling. Method: Existing literature survey is based on 31 articles from 77 articles published in various reputed journals, conferences, and workshops. Results: Challenges related to various crawling steps of deep web crawling are presented. RL-based techniques are being used in multiple research papers, which solves deep web crawling challenges. Comparative analysis of RL techniques used in deep web crawling is done based on the strength, metrics, dataset, and research gaps. Conclusion: Various RL-based techniques can be applied to deep web crawling, which has not been explored yet. Open challenges and research directions are also recommended.

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Punjab Engineering College (Deemed to be University), Chandigarh, India

Kapil Madan & Rajesh Bhatia

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Department of Computer Science Engineering, Maharaja Agrasen Institute of Technology, Rohini, Delhi, India

Deepak Gupta

Maharaja Agrasen Institute of Technology, Rohini, Delhi, India

Ashish Khanna

Institute of Engineering and Technology, Lucknow, Uttar Pradesh, India

Vineet Kansal

University of Calabria, Rende, Cosenza, Italy

Giancarlo Fortino

Department of Information Technology, Cairo University, Giza, Egypt

Aboul Ella Hassanien

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Madan, K., Bhatia, R. (2022). Reinforcement Learning in Deep Web Crawling: Survey. In: Gupta, D., Khanna, A., Kansal, V., Fortino, G., Hassanien, A.E. (eds) Proceedings of Second Doctoral Symposium on Computational Intelligence . Advances in Intelligent Systems and Computing, vol 1374. Springer, Singapore. https://doi.org/10.1007/978-981-16-3346-1_24

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Crawling the Dark Web: A Conceptual Perspective, Challenges and Implementation

Profile image of Randa Basheer

2019, Journal of Digital Information Management

Internet and network technologies have evolved dramatically in the last two decades, with rising users' demands to preserve their identities and privacy. Researchers have developed approaches to achieve users' demands, where the biggest part of the internet has formed, the Deep Web. However, as the Deep Web provides the resort for many benign users who desire to preserve their privacy, it also became the perfect floor for hosting illicit activities, which generated the Dark Web. This leads to the necessity of finding automated solutions to support law and security agencies in collecting information from the Dark Web to disclose such activities. In this paper, we illustrate the concepts needed for the development of a crawler that collects information from a dark website. We start from discussing the three layers of the Internet, the characteristics of the hidden and private networks, and the technical features of Tor network. We also addressed the challenges facing the dark web crawler. Finally, we presented our experimental system that fetches data from a dark market. This approach helps in putting a single dark website under investigation, and can be a seed for future research and development.

Related Papers

European Review of Organised Crime (EROC)

Criminologists have traditionally used official records, interviews, surveys, and observation to gather data on offenders. Over the past two decades, more and more illegal activities have been conducted on or facilitated by the Internet. This shift towards the virtual is important for criminologists as traces of offenders’ activities can be accessed and monitored, given the right tools and techniques. This paper will discuss three techniques that can be used by criminologists looking to gather data on offenders who operate online: 1) mirroring, which takes a static image of an online resource like websites or forums; 2) monitoring, which involves an on-going observation of static and dynamic resources like websites and forums but also online marketplaces and chat rooms and; 3) leaks, which involve downloading of data placed online by offenders or left by them unwittingly. This paper will focus on how these tools can be developed by social scientists, drawing in part on our experience developing a tool to monitor online drug “cryptomarkets” like Silk Road and its successors. Special attention will be given to the challenges that researchers may face when developing their own custom tool, as well as the ethical considerations that arise from the automatic collection of data online.

ieee research paper on web crawler

Pastrana, S., Thomas, D. R., Hutchings, A., & Clayton, R. (2018). CrimeBB: Enabling cybercrime research on underground forums at scale. Lyon: ACM International World Wide Web (WWW) Conference.

Alice Hutchings

Underground forums allow criminals to interact, exchange knowledge, and trade in products and services. They also provide a pathway into cybercrime, tempting the curious to join those already motivated to obtain easy money. Analysing these forums enables us to better understand the behaviours of offenders and pathways into crime. Prior research has been valuable, but limited by a reliance on datasets that are incomplete or outdated. More complete data, going back many years, allows for comprehensive research into the evolution of forums and their users. We describe CrimeBot, a crawler designed around the particular challenges of capturing data from underground forums. CrimeBot is used to update and maintain CrimeBB, a dataset of more than 48m posts made from 1m accounts in 4 different operational forums over a decade. This dataset presents a new opportunity for large-scale and longitudinal analysis using up-to-date information. We illustrate the potential by presenting a case study using CrimeBB, which analyses which activities lead new actors into engagement with cybercrime. CrimeBB is available to other academic researchers under a legal agreement, designed to prevent misuse and provide safeguards for ethical research.

Alf Beauman (PI) 🇪🇺

Javad Hosseinkhani

IJCSMC Journal

QUEST JOURNALS

World Wide Web (or simply web) is a massive, wealthy, preferable, effortlessly available and appropriate source of information and its users are increasing very swiftly now a day. To salvage information from web, search engines are used which access web pages as per the requirement of the users. The size of the web is very wide and contains structured, semi structured and unstructured data. Most of the data present in the web is unmanaged so it is not possible to access the whole web at once in a single attempt, so search engine use web crawler. Web crawler is a vital part of the search engine. It is a program that navigates the web and downloads the references of the web pages. Search engine runs several instances of the crawlers on wide spread servers to get diversified information from them. The web crawler crawls from one page to another in the World Wide Web, fetch the webpage, load the content of the page to search engine's database and index it. Index is a huge database of words and text that occur on different webpage. This paper presents a systematic study of the web crawler. The study of web crawler is very important because properly designed web crawlers always yield well results most of the time.

Javad Hosseinkhani , Hamed Taherdoost

balaji narayanaswami

Web Mining is a natural combination of two active areas of current research, the Data mining and the World Wide Web. It can be classified into three different types i.e. web content mining, web structure mining and web usage mining. In this paper, we focused on some major aspects of web mining like Link Analysis - a data-analysis technique used to evaluate relationships between nodes by evaluating content, Web Crawling - a system that visits Web sites and reads their pages and other information in order to create entries for a search engine index and understand the structure of the web and Recommendation Systems - systems that produce a list of recommendations from web usage patterns. Through this paper, a detailed study of these techniques, algorithms and their future scopes are discussed.

Jakob Demant , gwern branwen

The development of cryptomarkets has gained increasing attention from academics, including growing scientific literature on the distribution of illegal goods using cryptomarkets. Dolliver's 2015 article “Evaluating drug trafficking on the Tor Network: Silk Road 2, the Sequel” addresses this theme by evaluating drug trafficking on one of the most well-known cryptomarkets, Silk Road 2.0. The research on cryptomarkets in general—particularly in Dolliver's article—poses a number of new questions for methodologies. This commentary is structured around a replication of Dolliver's original study. The replication study is not based on Dolliver's original dataset, but on a second dataset collected applying the same methodology. We have found that the results produced by Dolliver differ greatly from our replicated study. While a margin of error is to be expected, the inconsistencies we found are too great to attribute to anything other than methodological issues. The analysis and conclusions drawn from studies using these methods are promising and insightful. However, based on the replication of Dolliver's study, we suggest that researchers using these methodologies consider and that datasets be made available for other researchers, and that methodology and dataset metrics (e.g. number of downloaded pages, error logs) are described thoroughly in the context of web-o-metrics and web crawling.

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  1. Analysis of Focused Web Crawlers: A Comparative Study

    This research paper presents a comparative study of focused web crawlers, specialized tools designed for targeted information retrieval. By conducting a systematic analysis, the study evaluates the performance and effectiveness of different crawlers. The research methodology involves selecting crawlers based on specific criteria and employing evaluation metrics. Multiple datasets are utilized ...

  2. A review on techniques for optimizing web crawler results

    Now a days Internet is widely used by users to satisfy their information needs. In the exponential growth of web, searching for useful information has become more difficult. Web crawler helps to extract the relevant and irrelevant links from the web. To optimizing this irrelevant links various algorithms and technique are used. Discovering information by using web crawler have certain issues ...

  3. PDF A Cloud-based Web Crawler Architecture

    A Cloud-based Web Crawler Architecture Mehdi Bahrami1, Mukesh Singhal2 and Zixuan Zhuang3 Cloud Lab University of California, Merced, USA 1IEEE Senior Member, [email protected] 2 IEEE Fellow, [email protected] [email protected] Abstract—Web crawlers work on the behalf of applications or services to find interesting and related information on the web.

  4. (PDF) Exploring Dark Web Crawlers: A Systematic ...

    1 Department of Computer and Systems Sciences, (e-mail: [email protected]) 2 Department of Computer and Systems Sciences, (e-mail: [email protected])) Corresponding author: Jesper Bergman (e-mail ...

  5. PDF Design and Implementation of a High-Performance Distributed Web Crawler

    [email protected], [email protected] Abstract Broad web search engines as well as many more special-ized search tools rely on web crawlers to acquire large col-lections of pages for indexing and analysis. Such a web crawler may interact with millions of hosts over a period of weeks or months, and thus issues of robustness, flexibil-

  6. Experimental performance analysis of web crawlers using single and

    The ultimate aim of this paper is to present the working of single and multi-threaded web crawling and indexing algorithm using hierarchical clustering. The harvest rate is utilized to measure the harvesting capability of the web crawler. When a web page is crawled, the harvest rate for crawler is computed automatically.

  7. Crawling the Dark Web: A Conceptual Perspective, Challenges and

    The results of our hidden web mobile crawler are very promising and approximately 90% of the hidden web pages can be downloaded from a site automatically which is otherwise a very difficult task. View

  8. From Web Scraping to Web Crawling

    A past few studies [19,20,21] deal with effective and scalable Web crawlers. The paper starts with the explanation of four general methodologies working behind Web scraping tools and solutions. The later sections dive into a common understanding of Web crawling and implementation of an application-based Web crawler using Scrapy framework.

  9. (PDF) Web Crawling Model and Architecture

    Figure 1.8: The main data structures and the operation steps of the crawler: (1) the manager generates a batch of URLs, (2) the harvester. downloads the pages, (3) the gather er parses the pages ...

  10. [PDF] Exploring Dark Web Crawlers: A Systematic Literature Review of

    A Tor-based web crawling model was developed into an already existing software toolset customised for ACN-based investigations that was successful in scraping web content from both clear and dark web pages, and scraping dark marketplaces on the Tor network. Strong encryption algorithms and reliable anonymity routing have made cybercrime investigation more challenging. Hence, one option for law ...

  11. PDF Exploring Dark Web Crawlers: A systematic literature review of dark web

    The scientific contribution of this paper entails novel knowledge concerning ACN-based web crawlers. Furthermore, it presents a model for crawling and scraping clear and dark websites for the purpose

  12. Reinforcement Learning in Deep Web Crawling: Survey

    Only one research paper on RL was presented from the focused crawling domain and missed the RL technique implementation in the deep web domain. Kumar et al. presented a systematic literature review of a web crawler comprising of 248 papers published till the year 2014 . It contained only two research papers related to the RL technique.

  13. Research on Web Data Mining Based on Topic Crawler

    This paper analyzes the method of Web information data mining based on topic crawler. This paper puts forward the architecture of Web information search and data mining, and introduces the key technology and operation principle of the architecture. After analyzing the functions and shortcomings of ordinary crawler, this paper focuses on the working principle, implementation method and ...

  14. (PDF) Web Crawler: A Review

    In this paper, the applicability of Web Crawler in the field of web search and a review on Web Crawler to different problem domains in web search is discussed. Discover the world's research 25 ...

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    @DeveshS In the case of the 2nd document, the text of the abstract is, for some reason, sprinkled with non-well-formed xml tags, which don't render on the web page but do render on print.It's possible to extract the abstract from there by using a library such as lxml (although that probably should be presented in a separate question, per SO policy).

  16. (PDF) Summary of web crawler technology research

    important role in collecting ne twork data. A web c rawler is a computer program that trave rses hyperlinks. and indexes t hem. As the core part of the vertical search engine, how to make crawlers ...

  17. Crawling the Dark Web: A Conceptual Perspective, Challenges and

    In this paper, we illustrate the concepts needed for the development of a crawler that collects information from a dark website. We start from discussing the three layers of the Internet, the characteristics of the hidden and private networks, and the technical features of Tor network. We also addressed the challenges facing the dark web crawler.

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