Abstract
With the fast growth of quantum computers in recent years, the use of post-quantum cryptography has steadily become vital. In the privacy-preserving aggregation of federated learning, different cryptographic primitives, such as encryption, key agreement, digital signature, secret-sharing, and pseudorandom generator, may be used to protect users’ privacy. However, in the original privacy-preserving aggregation protocol, the classical cryptographic primitives are vulnerable to quantum attacks. Bonawitz et al. presented the SecAgg (Secure Aggregation) protocol, which is based on double-masking MPC (Multi-Party Computation). On this basis, we took advantage of the structure of the original protocol and the properties of lattice cryptography to apply lattice cryptography schemes to the protocol and presented a lattice-based post-quantum privacy-preserving aggregation protocol, which can withstand quantum attacks.
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Acknowledgements
This work is supported by Guangdong Major Project of Basic and Applied Basic Research (2019B030302008) and the National Natural Science Foundation of China (No. 61972429).
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Zuo, R., Tian, H., An, Z., Zhang, F. (2022). Post-quantum Privacy-Preserving Aggregation in Federated Learning Based on Lattice. In: Chen, X., Shen, J., Susilo, W. (eds) Cyberspace Safety and Security. CSS 2022. Lecture Notes in Computer Science, vol 13547. Springer, Cham. https://doi.org/10.1007/978-3-031-18067-5_23
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