How did I hid text in text

This is a bitwise way of hiding text within text. Let’s imagine the string :

Hacker

That I want to hide in the message:

Hello, I am Axel Thauvin

• First, we get the decimal representation in the UTF-8 table of each character in the Hacker string

  Here is the decimal representation of the first 127 characters in an array (also called ASCII array):

For the example, we will take the character H. Here, its decimal representation is 72 (base 10).

• Then we will convert this number to base 6 on 4 ‘bits’

  Why ?

  If we encode the letters in base 6 on 4 bits, we will have the maximum representation of 5555 -> that is 64 -> 1296 : which is the maximum value we can use in this table

  In fact we have 5 invisible characters which will correspond to the digits of these bits, which we will hide in our text.

  • For the 0 there is no hidden character.
  • For 1 it is the unicode character \u200C
  • For 2 it is the unicode character \u200D
  • For 3 it is the unicode character \u200E
  • For 4 it is the unicode character \u200F
  • For 5 it is the unicode character \u034F

  Example with H

  Here the decimal representation of H is 72. Its 4-bit base-6 representation is 0200.

  I will therefore :

  • Not add a character for the 1st bit (because it is 0)
  • Add the character \u200D for the 2nd bit (because it is 2)
  • Not add a character for the 3rd bit (because it is 0)
  • Do not add a character for the 4th bit (because it is 0)

  Let’s go back to the original string. I have Hello, I am Axel Thauvin. So I’ll write : He\u200Dll just for the H

  And I do the same with all the characters in Hacker. Which gives me: He‍‍llo‍,‏‍‌ ‏‍I‏‌‎ a‍‍͏m͏‏ ‍‎‏A͏x‍‎e‌͏l͏ T‍h‏a͏uv‎i‌n (generated with my program, you can try it on my website)

  Here is the result: