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🔐 Cryptography Algorithm Toolkit

A beginner-friendly, real-time Python project that demonstrates core concepts of modern cryptography using AES (symmetric encryption), RSA (asymmetric encryption),SHA256 (hashing) and Enky (custom XOR-based encryption). Designed to simulate real-world use cases like secure messaging, file encryption, and password hashing.

📌 Project Objectives

  • Implement and understand core cryptographic techniques:
    • AES for secure data encryption/decryption
    • RSA for public/private key cryptography
    • SHA256 for one-way data hashing
    • Enky for experimental key-based XOR encryption
  • Provide real-time user interaction
  • Create a modular, scalable architecture
  • Learn encryption workflow with file input/output and key handling

🧰 Technologies & Tools

  • Language: Python 3.8+
  • Libraries Used:
    • cryptography for AES & RSA
    • hashlib for SHA256
    • os, base64, json for file/key management
  • Structure: Modular folder system (/modules)
  • Optional Tools: PyCrypto, OpenSSL, tkinter (for GUI expansion)

🧪 Features & Demonstrations

🔐 AES (Advanced Encryption Standard)

  • Generate and save AES key
  • Encrypt user input messages
  • Decrypt saved encrypted messages
  • Use Fernet for secure symmetric encryption

🔑 RSA (Rivest–Shamir–Adleman)

  • Generate RSA key pair (public/private)
  • Encrypt a message using the public key
  • Decrypt it using the private key
  • Save/load RSA keys in .pem format

🔁 SHA256 Hashing

  • Hash plain text securely
  • Hash any file for integrity checking
  • Compare original vs current hash for tamper detection

🌀 Enky (Custom XOR-Based Encryption)

  • Interactive menu-based encryption/decryption
  • Key-dependent XOR encryption for learning purposes
  • Supports text messages in real-time
  • Optional multi-round encryption or shuffle can be added
  • Fully reversible with the correct key
  • Ideal for experimenting with custom symmetric encryption logic

💡 Real-Time Use Cases Simulated

Use Case Crypto Technique Used
Secure messaging AES
Digital signatures RSA
Password storage/verification SHA256
File tampering detection SHA256
Key-based access systems RSA
Experimental learning cipher Enky

🧪 Sample Outputs

🔐 Sample AES Output

Enter message to encrypt: Hello Aakash
Encrypted: gAAAAABo...
Decrypted: Hello Aakash

🔐 RSA Output

Enter message to encrypt: SecretMessage
Encrypted with Public Key: b'...'
Decrypted with Private Key: SecretMessage

🔐SHA256 Output

Input text: AAKASH
Hash: ac98f72f...

🌀 Enky Output

Enter message to encrypt: AAKASH
Enter key: 234
Encrypted (bytes):  b'\xbagX\xc4\x87\xea'
Decrypted message: AAKASH

📌 Future Improvements

✅ Add GUI with Tkinter or PyQt ✅ Support file encryption/decryption ✅ Add digital signature verification ✅ Use Salted Hashing for password security ✅ Store hash-key mapping securely in a DB (e.g., SQLite) ✅ Expand Enky with multiple rounds and key-based shuffling

Requirements

pip install cryptography pycryptodome

By Aakash