https://github.com/foss-cell-gecpkd/image-stego

Image Steganography
https://github.com/foss-cell-gecpkd/image-stego

image-steganography image-stego reactjs steganography

Last synced: about 2 months ago
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Image Steganography

• Host: GitHub
• URL: https://github.com/foss-cell-gecpkd/image-stego
• Owner: FOSS-Cell-GECPKD
• License: mit
• Created: 2020-09-09T04:47:07.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2021-12-17T08:50:34.000Z (over 3 years ago)
• Last Synced: 2023-05-05T14:38:39.877Z (almost 2 years ago)
• Topics: image-steganography, image-stego, reactjs, steganography
• Language: JavaScript
• Homepage: https://image-stego.vercel.app
• Size: 269 KB
• Stars: 14
• Watchers: 3
• Forks: 6
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# image-stego

[![License](https://img.shields.io/github/license/FOSS-Cell-GECPKD/image-stego?style=for-the-badge)](https://github.com/FOSS-Cell-GECPKD/image-stego/blob/main/LICENSE)

[![Issues](https://img.shields.io/github/issues/FOSS-Cell-GECPKD/image-stego?style=for-the-badge)](https://github.com/FOSS-Cell-GECPKD/image-stego/issues)

[![Chat on Gitter](https://img.shields.io/badge/chat--on-gitter-brightgreen?style=for-the-badge&logo=appveyor)](https://gitter.im/FOSS-Cell-GECPKD/image-stego)

## About




An Image Steganography (hiding/encoding information(text) in an image) web app.




Frameworks used:



  


      React Js 

   

   


     Material UI Framework  

  



Working Diagram



  
LSB based Image steganography

    
  LSB-Steganography is a steganography technique in which we hide messages inside an image by replacing Least significant bit of image with the bits of message to be hidden.As the LSB is only changed, the human eys cannot detect the changes in it. 

    


      
Encryption Algorithm

       
Begin

        

Input: Cover_Image, Secret_Message ;

        

Transfer Secret_Message into Text;

        

Convert Text to Binary_Codes;

        

Set BitsPerUnit to Zero;

        

Encode Message to Binary_Codes;

        

Add by 2 unit for bitsPerUnit;

        

Output: Stego_Image;

       

End

    



    


      
Decryption Algorithm

       
Begin

        

Input: Stego_Image

       

Calculate BitsPerUnit;

        

Decode All_Binary_Codes;

        

Shift by 2 unit for bitsPerUnit;

        

Convert Binary_Codes to Text;

       

Open Text;

        

Output Secret_Message;

       

End

    



  



Function used in steganography.js to encode the message

  

  // Encodes message using LSB method

  function encodeMessage(colors, message) {

    let messageBits = getBitsFromNumber(message.length);

    messageBits = messageBits.concat(getMessageBits(message));

    let history = [];

    let pos = 0;

    while (pos < messageBits.length) {

      let loc = getNextLocation(history, colors.length);

      colors[loc] = setBit(colors[loc], 0, messageBits[pos]);

      while ((loc + 1) % 4 !== 0) {

        loc++;

      }

      colors[loc] = 255;

      pos++;

    }

  };



Function used in steganography.js to decode the message



  // Decodes message from the image

  function decodeMessage(colors) {

    let history = [];

    let messageSize = getNumberFromBits(colors, history);

    if ((messageSize + 1) * 16 > colors.length * 0.75) {

      return '';

    }

    if (messageSize === 0) {

      return '';

    }

    let message = [];

    for (let i = 0; i < messageSize; i++) {

      let code = getNumberFromBits(colors, history);

      message.push(String.fromCharCode(code));

    }

    return message.join('');

  };







Contributions


Contributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are greatly appreciated.

To get this project, Follow the steps (It's Open and free :P )



1. Fork the Project


 


2. Clone the project  git clone https://github.com/yourrepo/image-stego.git

  


  After cloning, Setup the local machine with requirements 

  


    
Enter npm i to install the required modules

    
Enter npm start to run the project locally

  


3. Create your Feature Branch git checkout -b feature/changedFeature


 


4. Commit your Changes git commit -m 'Add some AmazingFeature'


 


5. Push to the Branch git push origin feature/changedFeature


 


6. Open a Pull Request

 
 






## License

Licensed under the [MIT License](LICENSE).

This project was a part of FOSS OpenHack '20: https://openhack.gitbook.io/openhack-20/.