Quantum Digital Signature Protocol using Quantum Fingerprinting

Overview

This repository contains an implementation of a Quantum Digital Signature (QDS) protocol using quantum fingerprinting and SWAP-test verification. The project investigates the security and robustness of the protocol against forgery, cloning, and repudiation attacks while also evaluating its performance under noisy communication channels.

The implementation is developed using Qiskit and includes a collection of reproducible notebooks that demonstrate both protocol execution and security analysis.

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Repository Structure

Quantum-Digital-Signature/
│
├── README.md
├── LICENSE
├── requirements.txt
├── .gitignore
│
├── notebooks/
│   ├── 01_protocol_implementation.ipynb
│   ├── 02_forgery_attack.ipynb
│   ├── 03_cloning_attack.ipynb
│   ├── 04_repudiation_attack.ipynb
│   └── 05_noise_and_security_analysis.ipynb
│
├── figures/
│
└── docs/
    ├── protocol_overview.md
    ├── attack_models.md
    └── results_summary.md

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Notebooks

Notebook	Description
01_protocol_implementation.ipynb	Core protocol implementation and verification workflow
02_forgery_attack.ipynb	Security evaluation against forgery attacks
03_cloning_attack.ipynb	Security evaluation against quantum cloning attacks
04_repudiation_attack.ipynb	Analysis of repudiation resistance
05_noise_and_security_analysis.ipynb	Noise robustness and overall security analysis

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Installation

Clone the repository:

git clone https://github.com/Ishaantheguy/QVeriSign.git
cd QVeriSign

Install dependencies:

pip install -r requirements.txt

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Running the Experiments

Launch Jupyter Notebook:

jupyter notebook

Run the notebooks in numerical order.

Each notebook is contains code necessary for it to be executed independently.

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Sample Results

The repository includes experiments covering:

• Probability of forgery success
• Repudiation probability
• Acceptance probability under noise
• Disturb analysis of cloning
• Fidelity distribution analysis

Generated figures can be found in the figures/ directory.

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Documentation

Additional technical documentation is available in:

• docs/protocol_overview.md
• docs/attack_models.md
• docs/results_summary.md

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License

Released under the MIT License.