Easy Lightweight Quantum Defense Program for Termux

Copy and Save to Hybrid_Quantum_Classical_Defense_System.py

import os
import hashlib
import binascii
import secrets
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend

Minimal quantum-resistant components

class QuantumResistantDefense:
def init(self):
# Using XMSS (eXtended Merkle Signature Scheme) inspired approach
# Note: This is a simplified simulation for demonstration
self.hash_algorithm = hashlib.sha3_512

def generate_quantum_key(self, length=64):
    """Generate a quantum-resistant key using OS randomness"""
    return secrets.token_bytes(length)

def quantum_hash(self, data):
    """Quantum-resistant hash function using SHA3-512"""
    if isinstance(data, str):
        data = data.encode('utf-8')
    return self.hash_algorithm(data).digest()

def lattice_based_encrypt(self, plaintext, key):
    """Simulate lattice-based encryption using AES as a stand-in"""
    # In a real implementation, this would use an actual lattice-based algorithm
    iv = os.urandom(16)
    cipher = Cipher(algorithms.AES(key), modes.CFB(iv), backend=default_backend())
    encryptor = cipher.encryptor()
    ciphertext = encryptor.update(plaintext) + encryptor.finalize()
    return iv + ciphertext

def lattice_based_decrypt(self, ciphertext, key):
    """Simulate lattice-based decryption using AES as a stand-in"""
    iv = ciphertext[:16]
    ciphertext = ciphertext[16:]
    cipher = Cipher(algorithms.AES(key), modes.CFB(iv), backend=default_backend())
    decryptor = cipher.decryptor()
    plaintext = decryptor.update(ciphertext) + decryptor.finalize()
    return plaintext

class TraditionalDefense:
def init(self):
self.kdf_iterations = 100000

def derive_key(self, password, salt):
    """Key derivation function for traditional encryption"""
    kdf = PBKDF2HMAC(
        algorithm=hashes.SHA256(),
        length=32,
        salt=salt,
        iterations=self.kdf_iterations,
        backend=default_backend()
    )
    return kdf.derive(password.encode())

def encrypt_file(self, file_path, key):
    """Encrypt a file using traditional AES encryption"""
    iv = os.urandom(16)
    cipher = Cipher(algorithms.AES(key), modes.CFB(iv), backend=default_backend())
    encryptor = cipher.encryptor()

    with open(file_path, 'rb') as f:
        plaintext = f.read()

    ciphertext = encryptor.update(plaintext) + encryptor.finalize()

    encrypted_path = file_path + '.enc'
    with open(encrypted_path, 'wb') as f:
        f.write(iv + ciphertext)

    return encrypted_path

def decrypt_file(self, file_path, key):
    """Decrypt a file using traditional AES encryption"""
    with open(file_path, 'rb') as f:
        data = f.read()

    iv = data[:16]
    ciphertext = data[16:]

    cipher = Cipher(algorithms.AES(key), modes.CFB(iv), backend=default_backend())
    decryptor = cipher.decryptor()
    plaintext = decryptor.update(ciphertext) + decryptor.finalize()

    decrypted_path = file_path.replace('.enc', '.dec')
    with open(decrypted_path, 'wb') as f:
        f.write(plaintext)

    return decrypted_path

class HybridDefenseSystem:
def init(self):
self.quantum = QuantumResistantDefense()
self.traditional = TraditionalDefense()
self.quantum_key_cache = {}

def secure_message(self, message):
    """Protect a message with hybrid quantum-classical encryption"""
    # Generate a quantum-resistant key
    q_key = self.quantum.generate_quantum_key()

    # Encrypt with quantum-resistant algorithm
    encrypted = self.quantum.lattice_based_encrypt(message.encode('utf-8'), q_key)

    # Hash the quantum key for storage
    key_hash = self.quantum.quantum_hash(q_key)
    self.quantum_key_cache[key_hash] = q_key

    return {
        'encrypted_message': binascii.hexlify(encrypted).decode('utf-8'),
        'key_hash': binascii.hexlify(key_hash).decode('utf-8')
    }

def retrieve_message(self, encrypted_data):
    """Retrieve a message protected with hybrid encryption"""
    encrypted_message = binascii.unhexlify(encrypted_data['encrypted_message'])
    key_hash = binascii.unhexlify(encrypted_data['key_hash'])

    if key_hash not in self.quantum_key_cache:
        raise ValueError("Quantum key not found in cache")

    q_key = self.quantum_key_cache[key_hash]
    decrypted = self.quantum.lattice_based_decrypt(encrypted_message, q_key)

    return decrypted.decode('utf-8')

def secure_file(self, file_path, password):
    """Protect a file with hybrid security"""
    # First layer: traditional encryption with strong KDF
    salt = os.urandom(16)
    key = self.traditional.derive_key(password, salt)
    encrypted_path = self.traditional.encrypt_file(file_path, key)

    # Second layer: quantum-resistant metadata protection
    file_hash = self.quantum.quantum_hash(open(file_path, 'rb').read())

    return {
        'encrypted_file': encrypted_path,
        'salt': binascii.hexlify(salt).decode('utf-8'),
        'file_hash': binascii.hexlify(file_hash).decode('utf-8')
    }

def verify_file_integrity(self, file_path, expected_hash):
    """Verify file integrity using quantum-resistant hash"""
    file_hash = self.quantum.quantum_hash(open(file_path, 'rb').read())
    expected_hash = binascii.unhexlify(expected_hash)
    return file_hash == expected_hash

def main():
print("Hybrid Quantum-Classical Defense System")
print("Designed for Termux with minimal dependencies\n")

defense = HybridDefenseSystem()

# Example usage
message = "Top secret quantum data"
print(f"Original message: {message}")

# Secure the message
secured = defense.secure_message(message)
print(f"\nSecured message data: {secured}")

# Retrieve the message
retrieved = defense.retrieve_message(secured)
print(f"\nRetrieved message: {retrieved}")

# File protection example
print("\nFile protection example:")
test_file = "test.txt"
with open(test_file, 'w') as f:
    f.write("Sample file content for encryption demo")

password = "strong_password_123"
secured_file = defense.secure_file(test_file, password)
print(f"File secured: {secured_file['encrypted_file']}")

# Verify file integrity
is_valid = defense.verify_file_integrity(test_file, secured_file['file_hash'])
print(f"File integrity valid: {is_valid}")

if name == "main":
main()