Cryptology ePrint Archive: Report 2021/1080

SplitGuard: Detecting and Mitigating Training-Hijacking Attacks in Split Learning

Ege Erdogan and Alptekin Kupcu and A. Ercument Cicek

Abstract: Distributed deep learning frameworks, such as split learning, have recently been proposed to enable a group of participants to collaboratively train a deep neural network without sharing their raw data. Split learning in particular achieves this goal by dividing a neural network between a client and a server so that the client computes the initial set of layers, and the server computes the rest. However, this method introduces a unique attack vector for a malicious server attempting to steal the client's private data: the server can direct the client model towards learning a task of its choice. With a concrete example already proposed, such training-hijacking attacks present a significant risk for the data privacy of split learning clients.

In this paper, we propose SplitGuard, a method by which a split learning client can detect whether it is being targeted by a training-hijacking attack or not. We experimentally evaluate its effectiveness, and discuss in detail various points related to its use. We conclude that SplitGuard can effectively detect training-hijacking attacks while minimizing the amount of information recovered by the adversaries.

Category / Keywords: applications / machine learning, data privacy, split learning

Date: received 22 Aug 2021

Contact author: eerdogan17 at ku edu tr

Available format(s): PDF | BibTeX Citation

Note: under review

Version: 20210823:063741 (All versions of this report)

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