Grover-blocks v1.0

Grover's algorithm for block cipher key search

The grover-blocks project contains implementations of Grover oracles for exhaustive key search on block ciphers via Grover's quantum search algorithm. Version 1.0 provides oracles for AES and LowMC in the quantum-focused programming language Q# and depends on the Microsoft Quantum Development Kit. The code can be used to obtain quantum resource estimates for exhaustive key search to inform the post-quantum security assessment of AES and LowMC.

The code was developed by Microsoft Research for experimentation purposes.

Issue with estimating resources

A problem with the ResourcesEstimator functionality in Q# has been found and reported in Issue #192. Currently, results may report independent lower bounds on depth and width that may not be simultaneously realizable in a quantum circuit. The Q# team has stated that they are working to resolve this issue.

Installation instructions

• AES
• LowMC

Contributors

• Fernando Virdia
• Samuel Jaques

License

Grover-blocks is licensed under the MIT License; see License for details.

References

[1] Samuel Jaques, Michael Naehrig, Martin Roetteler, and Fernando Virdia, "Implementing Grover oracles for quantum key search on AES and LowMC". Preprint available at https://eprint.iacr.org/2019/1146.

Contributing

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.opensource.microsoft.com.

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This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.