https://github.com/azimonti/quantum-key-distribution-simulation
Quantum Key Distribution (QKD) Simulator
https://github.com/azimonti/quantum-key-distribution-simulation
bb84-protocol ekert-protocol one-time-pad quantum-key-distribution quantum-mechanics quantum-optics
Last synced: 24 days ago
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Quantum Key Distribution (QKD) Simulator
- Host: GitHub
- URL: https://github.com/azimonti/quantum-key-distribution-simulation
- Owner: azimonti
- License: mit
- Created: 2025-03-29T23:21:11.000Z (28 days ago)
- Default Branch: master
- Last Pushed: 2025-03-30T06:43:57.000Z (28 days ago)
- Last Synced: 2025-03-30T07:26:41.107Z (28 days ago)
- Topics: bb84-protocol, ekert-protocol, one-time-pad, quantum-key-distribution, quantum-mechanics, quantum-optics
- Language: Python
- Homepage:
- Size: 225 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Quantum Key Distribution (QKD) Simulation
This repository simulates different quantum key distribution (QKD) methods:
- No encryption
- BB84 Protocol
- Ekert Protocol
To get started with these simulations:
1. Clone the repository:
```
git clone https://github.com/azimonti/quantum-key-distribution-simulation.git
```
2. Navigate to the repository directory:
```
cd quantum-key-distribution-simulation
```
3. Install required dependencies (a virtual environment can be created running the script `create_env.sh`):
```
pip install -r requirements.txt
```
4. Change `SECRET_KEY` in `config.json` (it is set as example for development purposes)
5 . Run the simulation scripts:
```
python app.py
```
## Simulations
All the simulations rely on one-time pad cryptography, which is absolutely secured. Therefore the encrypted message is always broadcasted on a a public channel and Eve can capture it.
The difference is how the secret key is exchanged and what is the behavior when an eavesdropper is intercepting the key and what Alice and Bob do to ensure that the key is not leaked.
### No Protocol
In the case where no encryption protocol is used, there is no reconciliation between Bob and Alice, and if an eavesdropper is present, just hold a valid copy of the key and can decode the message without Alice or Bob noticing it.
### BB84
The BB84 protocol uses quantum mechanics for key exchange. Alice sends a sequence of qubits to Bob, randomly encoding each bit using one of two bases (e.g., rectilinear {0°, 90°} or diagonal {45°, 135°}). Bob measures each incoming qubit randomly in one of the two bases.
After the transmission, Alice and Bob communicate over a public channel to reveal which basis they used for each qubit, discarding measurements where they used different bases. They then publicly compare a subset of the remaining bits. If an eavesdropper (Eve) intercepted and measured the qubits, she inevitably introduced errors because she did not know the original basis used by Alice. If the error rate exceeds a certain threshold, Alice and Bob discard the key, suspecting eavesdropping. Otherwise, they use the remaining agreed-upon bits (after error correction and privacy amplification) as their secret key.
## Contributing
Contributions to the Quantum Key Distribution Simulation project are welcome. Whether it's through submitting bug reports, proposing new features, or contributing to the code, your help is appreciated. For major changes, please open an issue first to discuss what you would like to change.
## License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
## Contact
If you have any questions or want to get in touch regarding the project, please open an issue or contact the repository maintainers directly through GitHub.
## TODO
- [x] Implement one-time pad cryptography ([#1](https://github.com/azimonti/quantum-key-distribution-simulation/issues/1))
- [x] Implement BB84 Protocol ([#2](https://github.com/azimonti/quantum-key-distribution-simulation/issues/2))
- [ ] Implement Ekert Protocol ([#3](https://github.com/azimonti/quantum-key-distribution-simulation/issues/3))