Showing posts with label Web Development. Show all posts
Showing posts with label Web Development. Show all posts

20 May 2023

Dark web

 


Dark web




Tor software Logo




The dark web is a part of the internet that isn't indexed by search engines. 

The dark web is the world wide web content that exists on darknets: overlay networks that use the Internet but require specific software, configurations, or authorization to access.

Through the dark web, private computer networks can communicate and conduct business anonymously without divulging identifying information, such as a user's location. The dark web forms a small part of the deep web, the part of the Web not indexed by web search engines, although sometimes the term deep web is mistakenly used to refer specifically to the dark web.

The darknets which constitute the dark web include small, friend-to-friend peer-to-peer networks, as well as large, popular networks such as Tor, Freenet, I2P, and Riffle operated by public organizations and individuals. Users of the dark web refer to the regular web as Clearnet due to its unencrypted nature. The Tor dark web or onionland uses the traffic anonymization technique of onion routing under the network's top-level domain suffix .onion.


Deep vs Dark web and Clear web

The terms “deep web” and “dark web” are sometimes used interchangeably, but they are not the same. Deep web refers to anything on the internet that is not indexed by and, therefore, accessible via a search engine like Google. Deep web content includes anything behind a paywall or requires sign-in credentials. It also includes any content that its owners have blocked web crawlers from indexing.

Estimates place the size of the deep web at between 96% and 99% of the internet. Only a tiny portion of the internet is accessible through a standard web browser—generally known as the “clear web” some time surface web.

No one really knows the size of the dark web, but most estimates put it at around 5% of the total internet. Again, not all the dark web is used for illicit purposes despite its ominous-sounding name.


Dark web browsers

Accessing the dark web requires the use of an anonymizing browser called Tor. The Tor browser routes your web page requests through a series of proxy servers operated by thousands of volunteers around the globe, rendering your IP address unidentifiable and untraceable. Tor works like magic, but the result is an experience that’s like the dark web itself: unpredictable, unreliable and maddeningly slow.


Dark web serch engenis

Dark web search engines exist, but even the best are challenged to keep up with the constantly shifting landscape. The experience is reminiscent of searching the web in the late 1990s. Even one of the best search engines, called Grams, returns results that are repetitive and often irrelevant to the query. Link lists like The Hidden Wiki are another option, but even indices also return a frustrating number of timed-out connections and 404 errors.


Dark web websites

Dark web websites look pretty much like any other site, but there are important differences. One is the naming structure. Instead of ending in .com or .co, dark web websites end in .onion. That’s “a special-use top level domain suffix designating an anonymous hidden service reachable via the Tor network,” according to Wikipedia. Browsers with the appropriate proxy can reach these sites, but others can’t.

Dark web websites also use a scrambled naming structure that creates URLs that are often impossible to remember. For example, a popular commerce site called Dream Market goes by the unintelligible address of “eajwlvm3z2lcca76.onion.”

Many dark websites are set up by scammers, who constantly move around to avoid the wrath of their victims. Even commerce sites that may have existed for a year or more can suddenly disappear if the owners decide to cash in and flee with the escrow money they’re holding on behalf of customers.


For sale in the dark web

The dark web has flourished thanks to bitcoin, the crypto-currency that enables two parties to conduct a trusted transaction without knowing each other’s identity. “Bitcoin has been a major factor in the growth of the dark web, and the dark web has been a big factor in the growth of bitcoin,” says Tiquet.

Nearly all dark web commerce sites conduct transactions in bitcoin or some variant, but that doesn’t mean it’s safe to do business there. The inherent anonymity of the place attracts scammers and thieves, but what do you expect when buying guns or drugs is your objective?

Dark web commerce sites have the same features as any e-retail operation, including ratings/reviews, shopping carts and forums, but there are important differences. One is quality control. When both buyers and sellers are anonymous, the credibility of any ratings system is dubious. Ratings are easily manipulated, and even sellers with long track records have been known to suddenly disappear with their customers’ crypto-coins, only to set up shop later under a different alias.


Some time secrecy compromise on dark web 

If you find your own information on the dark web, there’s precious little you can do about it, but at least you’ll know you’ve been compromised. Bottom line: If you can tolerate the lousy performance, unpredictable availability, and occasional shock factor of the dark web, it’s worth a visit. Just don’t buy anything there.





28 April 2023

Introduction of HTML



Introduction of HTML



HTML is the standard markup language for creating Web pages.


What is HTML

  • HTML stands for Hyper Text Markup Language
  • HTML is the standard markup language for creating Web pages
  • HTML describes the structure of a Web page
  • HTML consists of a series of elements
  • HTML elements tell the browser how to display the content
  • HTML elements label pieces of content such as "this is a heading", "this is a paragraph", "this is a link", etc.


A Simple HTML Document

<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
<h1>My First Heading</h1>
<p>My first paragraph.</p>
</body>
</html>

Its look like

My First Heading

My first paragraph.


Explanation

  • For Html language we can use notepad, html editor or web templates directly.
  • The <!DOCTYPE html> declaration defines that this document is an HTML5 document.
  • All the other tags are inclosed in between html start tag and end tag <html> all other tags </html>
  • The <html> element is the root element of an HTML page.
  • The <head> element contains meta information about the HTML page.
  • The <title> element specifies a title for the HTML page (which is shown in the browser's title bar or in the page's tab).
  • The <body> element defines the document's body, and is a container for all the visible contents, such as headings, paragraphs, images, hyperlinks, tables, lists, etc.
  • The <h1> element defines a large headingThe <p> element defines a paragraph.

What is HTML Element

An HTML element is defined by a start tag, some content, and an end tag:

<tagname> Content goes here... </tagname>

The HTML element is everything from the start tag to the end tag:

<h1>My First Heading</h1>

<p>My first paragraph.</p>

Explanation

  • The <h1> is start tag of heading 1 (1 represents size) which alwas ends on heading end tag </h1>
  • The <p>is start tag of paragraph which alwas ends on paragraph end tag </p>

Note: There are some content elements missing (the <br> element). 

Dead elements are dead elements.  Empty elements are two notes in and tag!





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