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# πŸ” Encrypted Text Classifier – 20 Newsgroups Cipher Challenge

This project is built for the [Kaggle Ciphertext Challenge](https://www.kaggle.com/competitions/20-newsgroups-ciphertext-challenge), where the goal is to classify encrypted text documents into 20 different newsgroup categories.

🎯 Even without decrypting the text, we trained a character-level machine learning model that achieves over **63% accuracy**.

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## πŸ“‚ Project Structure
cipher-classifier/
β”œβ”€β”€ app.py # Streamlit app
β”œβ”€β”€ cipher_classifier.pkl # Pickled model + vectorizer

β”œβ”€β”€ train.csv # Kaggle training data

β”œβ”€β”€ requirements.txt # Libraries for deployment

└── README.md





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## 🧠 Model Overview



- **Input:** Ciphertext strings (unreadable encrypted text)

- **Vectorization:** `CountVectorizer` with char-level n-grams (1 to 3)

- **Model:** Logistic Regression (sklearn)

- **Accuracy:** ~63% (without decryption)



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Example Output

Input (Ciphertext)	Predicted Label

['W')(7x1zay7Hb3...	15

Tx4a8M\HNsyp;HM...	8







πŸ“¦ Deployment

This app is designed to run on:



🟒 Hugging Face Spaces



🟒 Streamlit Cloud



πŸ”΅ GitHub





πŸ“Œ Kaggle Link

You can download the dataset from the official competition:

πŸ‘‰ Kaggle – 20 Newsgroups Ciphertext Challenge