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Thursday, June 2, 2016


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Icons made by Pixel Buddha from www.flaticon.com is licensed by CC 3.0 BY
Icons made by Freepik from www.flaticon.com is licensed by CC 3.0 BY
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Monday, July 14, 2014

How to download website | best program

Sometime we need browse site offline as online , by download it in your computer . There are some tools use to download whole site , some are good and other bad , here we discussing best tools or program use to download entire website .

HTTrack Website Copier is program use to downloading website , it's free and easy to use . HTTrack download Html ,image and other file from server to your computer .after downloaded you can open page offline as an online site ,It's arranged and view like online .

How to use HTTrack  ?
First download HTTrack from original site from this link :

Install it in your computer and open program to make new downloading website : 
How to download website

This is main window .. click in Next .. 

How to download website

 Now Enter project name ,add any name . And base path , mean where you want to download website in your computer .. and click Next .. 

How to download website

Now Add url of any website you want to download it , if you need to download my blog enter my website url : http://computers-easy.blogspot.com/ , after enter Next .. 

How to download website

Here you have additional option :
Disconnect when finished : When website finishing download will disconnect form internet .
Shutdown PC when finished : After website finishing download will shutdown your computer . 
Save settings only . do not launch download now: If you need to save project name with option you add and downloading another time ,click this radio button .

After that click finish to start downloading and copy website to your computer .
When download finish you can go to file you save website on it and find index.html file ,, it's the main page of website .

Advantage :
  • Free .
  • Easy to use .
  • When browse website in your computer is look like online website .
Disadvantage :
  • Take long time to download website . 
  • If downloading stop , you can't make resume download , you need to start new download .
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Saturday, July 12, 2014

What is Symmetric Key Encryption

Symmetric Key Encryption is one of Cryptographic Tools use for secret communication , some times called conventional encryption or single-key encryption .

This diagram explain algorithm :

We have in diagram 5 things , plaintext , encryption algorithm , secret key , decryption algorithm , and ciphertext .

How algorithm run ?
Plaintext : Our message we need to transfer to another side , it's our in put that fed into encryption algorithm .
Encryption Algorithm :It's do some substitutions and transformations on the plaintext , to encrypting plaintext by using secret key information .
Secret key :It's have information that need to encryption and decryption .
Decryption Algorithm : We can say reverse of encryption , take ciphertext and by using secret key to decryption message to original plaintext .
Ciphertext : scrambled message encrypted by encryption algorithm using secret key information and transfer to other side , it will be input to decryption algorithm , and by using secret key will be original plaintext .

To make this symmetric strong we need tow things :
first : strong algorithm , to encrypting message .
second : secret key must keep secure .

Tow way to Attacking Symmetric Encryption :
1- cryptanalysis , to use it we need some knowledge of the general characteristics of the plaintext .
2- brute-force attack , we try all possible keys until plaintext is obtained .

Sources: Computer Security: Principles and Practice by William Stallings and Lawrie Brown .
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Tuesday, February 26, 2013

playstation 4 preview



Before days playstation display some video about playstation 4 .
Video was gorgeous and demonstrates precision in the design of this version that everyone wishes to get it.

you can see video about playstation 4 from here :








To see more video game about playstation 4 visit palystation channel in youtube from this link :
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Thursday, January 31, 2013

Power searching with google | course



Improve your Google search skills with our Power Searching and Advanced Power Searching online courses.
  • Learn tips and tricks to become a fast and effective fact-finder with Power Searching with Google.
  • Deepen your understanding of solving complex research problems using advanced Google search techniques with Advanced Power Searching with Google.
  • Join a growing global community of Power Searchers.
Join our upcoming session
Registration for Advanced Power Searching with Google is open! Sign up now, the course begins on January 23

learn more about this courses in this video



join and start this course from this link :
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Sunday, January 6, 2013

The Best Antivirus Software Products 2013



Antivirus are the most important things to save your computer from attack or viruses .
People search to the best antivirus to save their information and computer .
In this subject we will display the best antiviruses software products in the world , and show different between them .
This rating depend in toptenreviews site and you can visit it from here :

The Best Antivirus Software Products 2013
Click to see more clarity



The rating depend in three main reasons :

performance


features


help and support

finally

what the antiviruses you are using ?


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Wednesday, January 2, 2013

How people searching in google ?




In 2012 there are more things happen .....
Happiness
Sad
Revolution
Disasters
and other ....
enjoy with this video made by google and show how people search in google


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