🔐 Crypto – Multi-Algorithm Text Encryption & Decryption Tool

📍 EPFL – Bachelor in Computer Science, Year 1 (2020)
🔗 Code Repository: GitHub Repository

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Crypto is a Java-based tool developed as part of an introductory programming project at EPFL, designed to encrypt and decrypt text using a variety of classical and modern algorithms. The tool provides both command-line execution and configuration through simple text files, offering an insightful learning experience into cryptographic techniques and basic programming concepts.

Key Features:

• Encryption schemes supported:
  • Caesar cipher
  • Vigenère cipher
  • XOR encryption
  • One-Time Pad (OTP)
  • Cipher Block Chaining (CBC)
• File I/O support for input/output operations and text file manipulation.
• Brute-force search and statistical decoding for attacking weak encryption schemes.
• Modular arithmetic for handling encryption and decryption of data.

Skills and Techniques:

This project served as an introduction to cryptographic fundamentals, enhancing skills in:

• Algorithm implementation
• File I/O
• Basic security principles using Java

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🛠 Tools & Libraries:

• Java

🧠 Techniques:

• File I/O
• Encryption algorithms
• Brute-force search
• Statistical decoding
• Modular arithmetic