Abstract
Secure Multi-Party Computation (SMPC) is usually treated as a special encryption way. Unlike most encryption methods using a private or public key to encrypt data, it splits a value into different shares, and each share works like a private key. Only get all these shares, we can get the original data correctly. In this paper, we utilize SMPC to protect the privacy of gradient updates in distributed learning, where each client computes an update and shares their updates by encrypting them so that no information about the clients’ data can be leaked through the whole computing process. However, encryption brings a sharp increase in communication cost. To improve the training efficiency, we apply gradient sparsification to compress the gradient by sending only the important gradients. In order to improve the accuracy and efficiency of the model, we also make some improvements to the original sparsification algorithm. Extensive experiments show that the amount of data that needs to be transferred is reduced while the model still achieves 99.6% accuracy on the MNIST dataset.
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Zhang, M., Zhou, Q., Liang, S., Yang, H. (2020). Improving Communication Efficiency for Encrypted Distributed Training. In: Yu, S., Mueller, P., Qian, J. (eds) Security and Privacy in Digital Economy. SPDE 2020. Communications in Computer and Information Science, vol 1268. Springer, Singapore. https://doi.org/10.1007/978-981-15-9129-7_40
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DOI: https://doi.org/10.1007/978-981-15-9129-7_40
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