Steganospace

Steganospace
├── ​Foreword
│   ​├── ​This project was created for the steganography lab of CS-5732 @ University of Minnesota Duluth.
│   ​└── ​It was inspired by former student April Seliger's submission for this lab.
│   ​    ​├── ​How Her's Worked
│   ​    ​│   ​├── ​In her submission, she placed zero-width space characters between each character to encode a message.
│   ​    ​│   ​├── ​The presence of a zero-width space encoded a "1".
│   ​    ​│   ​└── ​The lack of a zero-width space encoded a "0".
│   ​    ​└── ​Limitations
│   ​    ​    ​├── ​Although visually invisible, it was not invisible to the Carrat.
│   ​    ​    ​├── ​If the user manually scrubbed through affected text with the arrow keys it would skip.
│   ​    ​    ​│   ​└── ​Navigation would slow down as it iterated over zero-width spaces.
│   ​    ​    ​└── ​Also increased the cover size by 0.5 * size of the message-- noticeable.
├── ​Overview
│   ​├── ​Rather than what April did, we wanted to replace the existing spaces with other "space"s to be invisible.
│   ​├── ​We identified 11 suitable "space" characters in Unicode, but only ended up using 8 of them.
│   ​├── ​The message undergoes standard LZ77 compression via the pako library on the highest setting.
│   ​├── ​Data is then converted to octal which is used to replace the spaces in the cover with each digit.
│   ​│   ​├── ​0 -> U+0020 (Generic Space)
│   ​│   ​├── ​1 -> U+00A0 (Non-Breaking Space)
│   ​│   ​├── ​2 -> U+2000 (EN Quad Space)
│   ​│   ​├── ​3 -> U+2002 (EN Space)
│   ​│   ​├── ​4 -> U+2004 (1/3 EM Space)
│   ​│   ​├── ​5 -> U+2005 (1/4 EM Space)
│   ​│   ​├── ​6 -> U+2006 (1/6 EM Space)
│   ​│   ​├── ​7 -> U+2008 (Punctuation Space)
│   ​│   ​├── ​8 -> U+2009 (Thin Space) [Unused in Octal Implimentation]
│   ​│   ​├── ​9 -> U+202F (Narrow No-Break Space) [Unused in Octal Implimentation]
│   ​│   ​└── ​A -> U+205F (Medium Mathematical Space) [Unused in Octal Implimentation]
│   ​└── ​Although this program only encodes 1 digit of information for each word, by using octal is stores more than April's.
├── ​Requirements
│   ​├── ​Cover must be plain text (.txt).
│   ​├── ​Message may be of any type.
│   ​└── ​If the Cover is not large enough to encode the Message, a warning is given that says how much more space is needed.
├── ​Examples
│   ​└── ​https://lars.d.umn.edu/brendan/TurtleGang/Steganospace/Examples
└── ​GitHub Link
    ​└── ​https://github.umn.edu/hage0584/steganographyLab/tree/main/Steganography