kelvin-kahuho/Text-Encryption

This project encrypts a Kiswahili text paragraph using multiple substitution ciphers This project encrypts a Kiswahili text paragraph using multiple substitution ciphers: Caesar, Atbash, Monoalphabetic, Vigenère, Playfair, and Affine. Each encryption method uses a unique key or grid, with ciphertext provided for each type. ## Project Overview This project demonstrates the application of classical substitution ciphers on a Kiswahili paragraph. The objective is to show how each cipher transforms the original plaintext into ciphertext using various encryption methodologies. ## Ciphers Used 1. **Caesar Cipher** - **Key**: Shift of 3 - **Methodology**: Each letter in the plaintext is shifted 3 positions forward in the alphabet. - **Example Output**: `Kdso cdpcql cd ndoh dlntzzhtrp phdoydmrhk dlphxvokl phdoyhvkdq...` 2. **Atbash Cipher** - **Methodology**: The alphabet is reversed, mapping "A" to "Z," "B" to "Y," etc. - **Example Output**: `Szkl znznmr az pzov zoroqvc gkzobznzrh zntszmrxv gztzolrzn...` 3. **Monoalphabetic Cipher** - **Key**: Custom substitution alphabet - Plain Alphabet: `ABCDEFGHIJKLMNOPQRSTUVWXYZ` - Substitution Alphabet: `QWERTYUIOPASDFGHJKLZXCVBNM` - **Methodology**: Each letter in the plaintext is replaced by the corresponding letter in the substitution alphabet. - **Example Output**: `Qdvl qlwzui ql tqvr qmokztijzp wlkvxqljvq zkczgfpc jcklzpqo...` 4. **Vigenère Cipher** - **Key**: "KISWAHILI" - **Methodology**: Each letter in the plaintext is shifted based on the position of the corresponding letter in the repeating key. - **Example Output**: `Lkqj yrksnk yi njwn axkcfw yhjlvcno yfznlrqp niuqzfj jnrfw...` 5. **Playfair Cipher** - **Grid**: - Keyword: "KISWAHILI" arranged in a 5x5 grid, omitting repeated letters and merging "I" and "J" as one letter. - Example Grid: | K | I | S | W | A | |---|---|---|---|---| | H | L | B | C | D | | E | F | G | M | N | | O | P | Q | R | T | | U | V | X | Y | Z | - **Methodology**: Each pair of letters is encrypted according to the Playfair cipher rules. - **Example Output**: `Iykw plfbad pl …