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Letters Extraction

Tool to extract letters from a message according to a pattern. It is possible to hide a text into another by adding parasites letters. Letters can follow a regular pattern (eg: 1 letter of 2).

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Letters Extraction -

Tag(s) : Steganography, Data processing

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# Letters Extraction

## Letters Extractor from a Text

Tool to extract letters from a message according to a pattern. It is possible to hide a text into another by adding parasites letters. Letters can follow a regular pattern (eg: 1 letter of 2).

### How to extract letters from a text?

Consider the message ABCDEFGHIJKLMNOPQRSTUVWXYZ, dCode offers different modes for letters extraction:

Take 1 of N letters

Example: Taking 1 of 2 letters: A-C-E-G-I-K-M-O-O-O-U-W-Y-

Example: Taking 1 of 3 letters: A--D--G--J--M--P--S--V--Y-

Extract a pattern

Example: The pattern 2,3 means to take 1 letter each 2 and 1 letter each 3: A-C--F-H--K-M--P-R--U-W--Z

Extract by mask (1 = preserved letter, 0 = letter ignored)

Example: Using the binary mask 101: A-CD-FG-IJ-LM-OP-RS-UV-XY

The patterns and masks are repeated until reaching the end of the message.

If needed, start using any letter rather than the first letter.

Example: Taking a letter of 2 (starting at position 1): A-C-E-G-I-K-M-O-O-O-U-W-Y-

Example: Taking a letter of 2 (starting at position 2): -B-D-F-H-J-L-N-P-R-T-V-X-Z

Punctuation may (or may not) be taken into account in characters count.