Monday, November 29, 2010

Wireless Networking Precautions

A wireless internet is beneficial in many ways. It allows one to work anywhere they please so long as they are in the proximity of the wireless transmission. However, there is a negative side to all this. If you are able to pick up a wireless signal, so will everyone else in the area. An unsecure wireless network is open to anyone besides you. What makes this bad is because of the information that people can observe and take from your wireless internet. Anyone can spy on your online activity. Some can even gain access to your computer’s hard drive through an unsecured wireless network.
                With that in mind, there are ways to help prevent all this from happening. One way is to have a strong and up to date anti virus program. Anti virus programs allow for the protection of your computer and will scan for any issues or possible threats. Your routers should have a fire wall which will lessen the chance of a hacker hack into your computer. Most routers these days can be only accessed through passwords. This relates back to the “Strong password” section. Creating a strong password that can only be accessed by you and anyone you want will allow for a greater protection against outsiders.













Strong Password (How to create and use them)

The key to a strong password is it’s length and complexity. This would involve letters, punctuations, symbols, and numbers as well. Using 14 characters or more, varying the characters, as well as using the entire keyboard rather than the letters you usually see all helps in creating a strong password.
          Adding special characters such as !,@,#,$,%,^,&, and * allows for a strong password that is hard to crack. To add on to this, making certain letters in your password capital and lowercase also helps with its complexity. Passwords containing common knowledge such as birth dates or your name in any way or form is not recommended in creating a strong password. Even with all this though, a password should always be unique only to you and that is what makes it a strong password.

Internet Parental Control Software

      This is similar to internet filters. It gives the parent the ability to control and monitor the children’s use of the internet. These software’s can be set and left alone and it would still do it’s job even when the parent is away at work or on vacation. This software is in comparison to a parent who is virtually watching and prohibiting what the children does on the internet constantly.
      However, these software’s are not only for parents. They are known to be used in businesses as well as schools in order to prevent unwanted material to be viewed to protect their workers or students respectively.

Internet Filters

An internet filter is a way for parents to help monitor and control the web content that can be viewed on the computer to protect their family. It is a software that is essential for responsible parents to help watch their children’s activity online. Internet filters give us a fighting chance to push away unwanted material to protect their families from internet predators.
          These kinds of software allows a parent to block websites, safe search, set time restrictions to block web access during designated times, and so on. Internet filters is just one way of protecting children from the internet. 

Internet Parental Guidance

          Internet Parental Guidance is mainly a way for parents to protect their children from online predators roaming around the internet. A good parent would monitor how long their children are involved on the internet, stop things such as pornography along with any other objectionable material, as well as limiting their children’s activity online.
          Medias such as films and television have been forced to restrict minors from observing such adult materials. This has worked for that specific area, however, the it has not been fully accomplished with the internet. The internet is an expansive space where people are constantly being drawn in by internet predators. Since no such law was passed in order to prevent children from viewing such material, parents should always observe and be aware of their children’s activity on the internet.

Digital Image Steganography

Steganography in general is known as the art or science of writing hidden messages in a way where others beside the sender and the receiver will know of its existence. There are different types of seganography. For example, there is Physical steganography, digital steganography, Network steganography, printed steganography, and steganography using Sudoku puzzles.
          Digital Steganography is concealing messages digitally. These can be messages in sound files/ noisy images, concealing data within encrypted or random data, pictures, videos, and even in blogs. Digital Image Steganography is strictly speaking of digital pictures containing a hidden message. Something like this can be done by combining two files together. For example, one can take a picture of a bird which would be the target picture and combine it with the key image (message) and create an digital image steganography. The key image has to be extracted from the original image in order to observe the message.

Thursday, November 4, 2010

Computer Forensics

        Computer forensics is the collection, preservation, analysis, and presentation of computer-related evidence. The goal of computer forensics is to explain the current state of a digital artifact; such as a computer system, storage medium ( hard disk or CD-ROM), an electronic document (e.g. an email message or JPEG image). The scope of a forensic analysis can vary from simple information retrieval to reconstructing a series of events.


        Computer foresnics is important because it will help ensure the overall integrity and survivability of your network infrastructure. Computer evidence can be useful in criminal cases, civil disputes, and human resources/employment proceedings.  Computer forensics can often find evidence of, or even completely recover, lost or deleted information, even if it was intentionally deleted. 
      


                 







Friday, September 24, 2010

HTML: A fun programming language

                What HTML stands for is hypertext markup language.  The definition of HTML is a set of tags and rules for using them in hypertext documents.   HTML is a very fascinating it can do many things.  HTML is a text and image formatting language used by web browsers to dynamically format web pages.  You can create your very own web page with HTML.  Web Pages must be written with HTML.  HTML is not a programming language it’s a markup language.  Markup language is a set of words and symbols for describing the identity of pieces of a document.  And a markup language is a set of markup tags.  Markup tags are used to describe WebPages.  Sometimes the HTML markup tags are called HTML tags.  HTML tags are keywords in angle brackets. 
For example it would look like <html>.  An HTML document is a webpage.  The inventor of HTML was Tim Berners Lee in the year 1991.  He was assisted by his colleagues in the scientific business in Switzerland.  HTML allows images and objects to be embedded and can be used to create interactive forms.  HTML can also be used to include Cascading Style Sheets  to define the appearance and layout of text and other material.  Cascading Style Sheets is a style sheet language used to describe the presentation semantics of a document written in a markup language.  Html style attribute is to provide a common way to style all html elements.  Styles was introduced with HTML 4, as the new and preferred way to style HTML elements. With HTML styles, styles can be added to HTML elements directly by using the style attribute, or indirectly in separate style sheets. The abbreviation of cascading style sheets is CSS.  Html has gone through many different versions.  In 1995 HTML 2.0 was created.  Over the years until 2001 they upgraded html 3 times.  They just kept adding new features and making it better.  An HTML element is everything from the start tag to the end tag.  The element content is everything between the start and the end tag.  Headings are defined with the <h1> to <h6> tags.  <h1> defines the largest heading. <h6> defines the smallest heading.  HTML comments can be inserted into the HTML code to make it more readable and understandable.
Comments are ignored by the browser and are not displayed.  To find html codes for a web page you are viewing, you right click on the page then you go to view source.  Then a page will come up with all the html codes on it.  Html tags are defined with <p>.  HTML attributes are defined as <a>.  HTML uses tags like <b> and <i> for formatting output, like bold or italic text.  These HTML tags are called formatting tags.  Here are some more examples of formatting tags.  <big> defines big text, <em> defines emphasized text, <small> defines small text, <strong> defines strong text, <del> defines deleted text, <ins> defines inserted text.  There are many other tags but these where just some simple examples that I found.  Html style attribute is to provide a common way to style all html elements.  A hyperlink is a word, group of words, or image that you can click on to jump to a new document or a new section within the current document.  The HTML code for a link is simple.  It looks like this <a href="url">Link text</a>.  Html tables are divided into rows and each row is divided into data cells.  <td> stands for table data and holds contents of a data cell. A <td> tag can contain links, texts, images, lists, forms, other tables, etc.  With html frames, you can display more than one HTML document in the same browser window. Each HTML document is called a frame. The disadvantages of using frames are 1. The web developer must keep track of more HTML documents and 2. It is difficult to print the entire page.  HTML colors are defined using a hexadecimal notation for the combination of Red, Green, and Blue color values. The colors red, green and blue can give you 16 million different color choices.  Html is a lot of work.  You have to learn a lot.  But when you learn all the neat tricks to html you will benefit in making your own webpage. You can be known for making one of the best web pages.  What I found fascinating is that you can view the html codes by right clicking on the page.  

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