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Examining the Adversarial Test Accuracy of Later Exits in NEO-KD Networks

by Writings, Papers and Blogs on Text ModelsSeptember 30th, 2024

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The Discussions on Performance Degradation at Later Exits section highlights that later exits in NEO-KD often exhibit lower adversarial test accuracy compared to earlier exits. This is attributed to adversarial examples targeting later exits incurring higher cumulative losses, leading to their reduced performance. To mitigate this issue, implementing an ensemble strategy, as discussed in the context of budgeted prediction setups, can enhance the effectiveness of later exits.

featured image - Examining the Adversarial Test Accuracy of Later Exits in NEO-KD Networks

Authors:

(1) Seokil Ham, KAIST;

(2) Jungwuk Park, KAIST;

(3) Dong-Jun Han, Purdue University;

(4) Jaekyun Moon, KAIST.

Table of Links

Abstract and 1. Introduction

2. Related Works

3. Proposed NEO-KD Algorithm and 3.1 Problem Setup: Adversarial Training in Multi-Exit Networks

3.2 Algorithm Description

4. Experiments and 4.1 Experimental Setup

4.2. Main Experimental Results

4.3. Ablation Studies and Discussions

5. Conclusion, Acknowledgement and References

A. Experiment Details

B. Clean Test Accuracy and C. Adversarial Training via Average Attack

D. Hyperparameter Tuning

E. Discussions on Performance Degradation at Later Exits

F. Comparison with Recent Defense Methods for Single-Exit Networks

G. Comparison with SKD and ARD and H. Implementations of Stronger Attacker Algorithms

E Discussions on Performance Degradation at Later Exits

As can be seen from the results for the anytime prediction in the main manuscript, the adversarial test accuracy of the later exits is sometimes lower than the performance of earlier exits. This phenomenon can be explained as follows: In general, we observed via experiments that adversarial examples targeting later exits has the higher sum of losses from all exits compared to adversarial examples targeting earlier exits. This makes max-average or average attack mainly focus on attacking the later exits, leading to low adversarial test accuracy at later exits. The performance of later exits can be improved by adopting the ensemble strategy as in the main manuscript for the budgeted prediction setup.