qcrypto 0.1.2

Quantum-safe cryptography utilities built on top of liboqs-python

qcrypto

Version: 0.1.2

qcrypto is a lightweight Python library providing simple, Pythonic wrappers around post-quantum cryptography (PQC) algorithms using the official liboqs-python bindings from the Open Quantum Safe project.

The library currently includes:

• Kyber Key Encapsulation Mechanism (KEM)
• Dilithium digital signatures
• A hybrid PQC + AES-GCM encryption scheme
• Clean utility classes and exception handling

qcrypto is suitable for learning PQC, research, prototyping, and experiments involving quantum-safe primitives.

Features

Kyber KEM

• Public/secret key generation
• Encapsulation (ciphertext + shared secret)
• Decapsulation (recover shared secret)
• Supports Kyber512, Kyber768, Kyber1024

Dilithium Signatures

• Keypair generation
• Message signing
• Signature verification
• Supports Dilithium2, Dilithium3, Dilithium5

Hybrid PQC + AES Encryption

A simple hybrid model where:

• Kyber encapsulates a symmetric key
• AES-256-GCM encrypts the message
• Result is (kem_ciphertext, aes_ciphertext)

Installation

Requires Python 3.8+.

pip install qcrypto

This installs liboqs-python automatically.

Usage (brief) Example

from qcrypto import KyberKEM

kem = KyberKEM("Kyber768")
keys = kem.generate_keypair()

ciphertext, ss1 = kem.encapsulate(keys.public_key)
ss2 = kem.decapsulate(ciphertext)

print("Shared secret match:", ss1 == ss2)

More complete usage examples are available in the examples/ directory

Implementation Notes

• Uses liboqs-python, which bundles OQS C library implementations.
• Hybrid encryption uses AES-256-GCM.
• Pure Python package, no compiled extensions.
• Modern PEP 621 src/ layout.

Coming Soon

• Key Serialization
• High-level Encryption API
• Falcon, SPHINCS+

Disclaimer

This library is for educational, experimental, and research use.
It is not a production security component and has not undergone cryptographic review.

License

MIT License.

Resources

• Open Quantum Safe Project: https://openquantumsafe.org
• liboqs-python: https://github.com/open-quantum-safe/liboqs-python