Wi-Fi Network Hacking

Wireless networks are everywhere; they are widely available, cheap, and easy to setup. To avoid the hassle of setting up a wired network in my own home, I chose to go wireless. After a day of enjoying this wireless freedom, I began thinking about security. How secure is my wireless network? 

I searched the Internet for many days, reading articles, gathering information, and participating on message boards and forums. I soon came to the realization that the best way for me to understand the security of my wireless network would be to test it myself. Many sources said it was easy, few said it was hard. 

Steganography

What is Steganography?

 Steganography is the art and science of hiding information by embedding messages within other, seemingly harmless images or other types of media. 

The word steganography is of Greek origin and means "concealed writing". The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography disguised as a book on magic. Generally, messages will appear to be something else: images, articles, shopping lists, or some other covertext and, classically, the hidden message may be in invisible ink between the visible lines of a private letter.

Hide File In Image

How Can We Hide The File In Image.

1. Gather the file you wish to bind, and the image file, and place them in a folder. I will be using C:\New Folder

-The image will hereby be referred to in all examples as xyz.jpg
-The file will hereby be referred to in all examples as New Text Document.txt

2. Add the file/files you will be injecting into the image into a WinRar .rar or .zip. From here on this will be referred to as (secret.rar)

3. Open command prompt by going to Start > Run > cmd

4. In Command Prompt, navigate to the folder where your two files are by typing
cd location [ex: cd C:\New Folder]

5. Type [copy /b xyz.jpg + secret.rar xyz.jpg] (remove the brackets)

Congrats, as far as anyone viewing is concerned, this file looks like a JPEG, acts like a JPEG, and is a JPEG, yet it now contains your file.

In order to view/extract your file, there are two options that you can take

a) Change the file extension from xyz.jpg to xyz.rar, then open and your file is there
b) Leave the file extension as is, right click, open with WinRar and your file is there

EnJoy HacKinG...

What is Cryptography ?

By definition cryptography is the process of converting recognisable data into an encrypted code for transmitting it over a network (either trusted or untrusted). Data is encrypted at the source


In all cases, the initial unencrypted data is referred to as plaintext. It is encrypted into ciphertext, which will in turn (usually) be decrypted into usable plaintext using different encryption algorithms. 


     Plaintext =>Ciphertext=> Plaintext=>Encryption=> Decryption



The Purpose :-


  Authentication : The process of proving one's identity.

  Privacy/confidentiality : Ensuring that no one can read the message except the intended receiver. 

  Integrity : Assuring the receiver that the received message has not been altered in any way from the original. 

  Non-repudiation : A mechanism to prove that the sender really sent this message.