This script implements various text hiding and embedding techniques to demonstrate how hidden or embedded instructions can be concealed in text. Users can select a technique, provide a text blob as a payload, or submit a text file as input.

1. Zero Width Characters: Embeds invisible zero-width characters.
2. Unicode Whitespace: Uses Unicode whitespace characters to hide text.
3. Base64 Encoding: Encodes the text in Base64 and appends it.
4. URL Encoding: Encodes the text using URL encoding.
5. Zero Font Size: Hides text by setting font size to zero.
6. Small Font Size: Hides text with a very small font size.
7. HTML Comment Tags: Embeds text within HTML comment tags.
8. Character Substitution: Substitutes characters with visually similar ones from different scripts.
9. Homoglyphs: Uses similar-looking characters from different alphabets.
10. Polyglot Text: Embeds text in multiple languages.
11. Hidden in Plain Sight: Uses sentences with hidden instructions.
12. Metadata Fields: Embeds text within metadata fields.
13. JavaScript Embedding: Embeds text within JavaScript code.
14. CSS Manipulation: Hides text using CSS.

No additional packages are required for this script.

Run the script with the desired technique, specifying either a payload or a file containing the text.

• -t, --technique: Technique to use. Choices are zero_width, unicode_whitespace, base64, url, zero_font, small_font, html_comment, char_sub, homoglyphs, polyglot, plain_sight, metadata, javascript, css.
• -p, --payload: Text payload to process.
• -f, --file: File containing text payload.

Using Payload:

1. Zero Width Characters

   python text_embedding.py -t zero_width -p "This is a test."
   

   Output:

   This is a test.‍hidden
   

2. Unicode Whitespace

   python text_embedding.py -t unicode_whitespace -p "This is a test."
   

   Output:

   This is a test. hidden
   

3. Base64 Encoding

   python text_embedding.py -t base64 -p "This is a test."
   

   Output:

   This is a test.VGhpcyBpcyBhIHRlc3Q=
   

4. URL Encoding

   python text_embedding.py -t url -p "This is a test."
   

   Output:

   This is a test.hidden
   

5. Zero Font Size

   python text_embedding.py -t zero_font -p "This is a test."
   

   Output:

   <p>This is a test.<span style="font-size:0">hidden</span></p>

6. Small Font Size

   python text_embedding.py -t small_font -p "This is a test."
   

   Output:

   <p>This is a test.<span style="font-size:1px">hidden</span></p>

7. HTML Comment Tags

   python text_embedding.py -t html_comment -p "This is a test."
   

   Output:

   <p>This is a test.<!-- hidden --></p>

8. Character Substitution

   python text_embedding.py -t char_sub -p "This is a test."
   

   Output:

   This is a test.hеllо
   

9. Homoglyphs

   python text_embedding.py -t homoglyphs -p "This is a test."
   

   Output:

   This is a test.hеllо
   

10. Polyglot Text

    python text_embedding.py -t polyglot -p "This is a test."
    

    Output:

    This is a test.こんにちは
    

11. Hidden in Plain Sight

    python text_embedding.py -t plain_sight -p "This is a test."
    

    Output:

    This is a test. By the way, every first letter here spells a hidden message.
    

12. Metadata Fields

    python text_embedding.py -t metadata -p "This is a test."
    

    Output:

    <meta name="description" content="This is a test.">

13. JavaScript Embedding

    python text_embedding.py -t javascript -p "This is a test."
    

    Output:

    <script>var hidden="This is a test.";</script>

14. CSS Manipulation

    python text_embedding.py -t css -p "This is a test."
    

    Output:

    <p>This is a test.<span style="display:none">hidden</span></p>

Using File:

1. Zero Width Characters

   python text_embedding.py -t zero_width -f input.txt
   

   Output:

   This is a test.‍hidden
   

2. Unicode Whitespace

   python text_embedding.py -t unicode_whitespace -f input.txt
   

   Output:

   This is a test. hidden
   

3. Base64 Encoding

   python text_embedding.py -t base64 -f input.txt
   

   Output:

   This is a test.VGhpcyBpcyBhIHRlc3Q=
   

4. URL Encoding

   python text_embedding.py -t url -f input.txt
   

   Output:

   This is a test.hidden
   

5. Zero Font Size

   python text_embedding.py -t zero_font -f input.txt
   

   Output:

   <p>This is a test.<span style="font-size:0">hidden</span></p>

6. Small Font Size

   python text_embedding.py -t small_font -f input.txt
   

   Output:

   <p>This is a test.<span style="font-size:1px">hidden</span></p>

7. HTML Comment Tags

   python text_embedding.py -t html_comment -f input.txt
   

   Output:

   <p>This is a test.<!-- hidden --></p>

8. Character Substitution

   python text_embedding.py -t char_sub -f input.txt
   

   Output:

   This is a test.hеllо
   

9. Homoglyphs

   python text_embedding.py -t homoglyphs -f input.txt
   

   Output:

   This is a test.hеllо
   

10. Polyglot Text

    python text_embedding.py -t polyglot -f input.txt
    

    Output:

    This is a test.こんにちは
    

11. Hidden in Plain Sight

    python text_embedding.py -t plain_sight -f input.txt
    

    Output:

    This is a test. By the way, every first letter here spells a hidden message.
    

12. Metadata Fields

    python text_embedding.py -t metadata -f input.txt
    

    Output:

    <meta name="description" content="This is a test.">

13. JavaScript Embedding

    python text_embedding.py -t javascript -f input.txt
    

    Output:

    <script>var hidden="This is a test.";</script>

14. CSS Manipulation

    python text_embedding.py -t css -f input.txt
    

    Output:

    <p>This is a test.<span style="display:none">hidden</span></p>

License This project is licensed under the MIT License.

This script provides a comprehensive set of techniques for hiding or embedding text, suitable for various scenarios where text needs to be concealed from casual observation but still interpreted by an AI model or similar systems.