## Line Charts: Performance Comparison of Backdoor Attacks and Defenses ### Overview The image presents six line charts, arranged in a 2x3 grid, comparing the performance of different backdoor attack and defense strategies. The charts plot HIT@5 (Hit Rate at 5) against varying attack strengths (represented by values 1.0, 0.9, 0.7, and 0.5, with "0.7 (Default)" also indicated on the x-axis). The strategies being compared are BL_I, BL_II, ROAR_I_p, and ROAR_CD. Each chart focuses on a specific scenario: Backdoor-Vulnerability, Backdoor-Diagnosis, Backdoor-Commonsense (Freebase), Targeted-Vulnerability, Targeted-Diagnosis, and Targeted-Commonsense (Freebase). ### Components/Axes * **X-axis:** Attack Strength (values: 0.3, 0.5, 0.7 (Default), 0.8, 0.9, 1.0). * **Y-axis:** HIT@5 (Hit Rate at 5), ranging from 0.00 to 1.00. * **Lines:** Represent different attack/defense strategies: * BL_I (Blue Solid Line) * BL_II (Blue Dashed Line) * ROAR_I_p (Green Triangle Dashed Line) * ROAR_CD (Yellow Diamond Solid Line) * **Legend:** Located at the top-left of each chart, indicating the color and line style corresponding to each strategy. * **Chart Titles:** Located below each chart, identifying the specific scenario being evaluated (e.g., "(a) Backdoor-Vulnerability"). ### Detailed Analysis or Content Details **Chart (a) Backdoor-Vulnerability:** * BL_I: Starts at approximately 0.75 at x=1.0, decreases to approximately 0.55 at x=0.9, remains relatively stable around 0.55-0.60 between x=0.7 and x=0.5. * BL_II: Starts at approximately 0.70 at x=1.0, decreases to approximately 0.50 at x=0.9, remains relatively stable around 0.45-0.50 between x=0.7 and x=0.5. * ROAR_I_p: Starts at approximately 0.25 at x=1.0, increases to approximately 0.35 at x=0.9, remains relatively stable around 0.30-0.35 between x=0.7 and x=0.5. * ROAR_CD: Starts at approximately 0.05 at x=1.0, increases to approximately 0.15 at x=0.9, remains relatively stable around 0.10-0.15 between x=0.7 and x=0.5. **Chart (b) Backdoor-Diagnosis:** * BL_I: Starts at approximately 0.80 at x=1.0, decreases to approximately 0.60 at x=0.8, decreases to approximately 0.40 at x=0.5. * BL_II: Starts at approximately 0.75 at x=1.0, decreases to approximately 0.55 at x=0.8, decreases to approximately 0.35 at x=0.5. * ROAR_I_p: Starts at approximately 0.30 at x=1.0, decreases to approximately 0.20 at x=0.8, decreases to approximately 0.10 at x=0.5. * ROAR_CD: Starts at approximately 0.05 at x=1.0, remains relatively stable around 0.05-0.10 between x=0.8 and x=0.5. **Chart (c) Backdoor-Commonsense (Freebase):** * BL_I: Starts at approximately 0.80 at x=1.0, decreases to approximately 0.60 at x=0.8, decreases to approximately 0.40 at x=0.3. * BL_II: Starts at approximately 0.75 at x=1.0, decreases to approximately 0.55 at x=0.8, decreases to approximately 0.35 at x=0.3. * ROAR_I_p: Starts at approximately 0.30 at x=1.0, decreases to approximately 0.20 at x=0.8, decreases to approximately 0.10 at x=0.3. * ROAR_CD: Starts at approximately 0.05 at x=1.0, remains relatively stable around 0.05-0.10 between x=0.8 and x=0.3. **Chart (d) Targeted-Vulnerability:** * BL_I: Starts at approximately 0.80 at x=1.0, decreases to approximately 0.60 at x=0.9, decreases to approximately 0.40 at x=0.5. * BL_II: Starts at approximately 0.75 at x=1.0, decreases to approximately 0.55 at x=0.9, decreases to approximately 0.35 at x=0.5. * ROAR_I_p: Starts at approximately 0.25 at x=1.0, increases to approximately 0.35 at x=0.9, decreases to approximately 0.25 at x=0.5. * ROAR_CD: Starts at approximately 0.05 at x=1.0, increases to approximately 0.15 at x=0.9, decreases to approximately 0.10 at x=0.5. **Chart (e) Targeted-Diagnosis:** * BL_I: Starts at approximately 0.80 at x=1.0, decreases to approximately 0.60 at x=0.8, decreases to approximately 0.40 at x=0.5. * BL_II: Starts at approximately 0.75 at x=1.0, decreases to approximately 0.55 at x=0.8, decreases to approximately 0.35 at x=0.5. * ROAR_I_p: Starts at approximately 0.30 at x=1.0, decreases to approximately 0.20 at x=0.8, decreases to approximately 0.10 at x=0.5. * ROAR_CD: Starts at approximately 0.05 at x=1.0, remains relatively stable around 0.05-0.10 between x=0.8 and x=0.5. **Chart (f) Targeted-Commonsense (Freebase):** * BL_I: Starts at approximately 0.80 at x=1.0, decreases to approximately 0.60 at x=0.8, decreases to approximately 0.40 at x=0.3. * BL_II: Starts at approximately 0.75 at x=1.0, decreases to approximately 0.55 at x=0.8, decreases to approximately 0.35 at x=0.3. * ROAR_I_p: Starts at approximately 0.30 at x=1.0, decreases to approximately 0.20 at x=0.8, decreases to approximately 0.10 at x=0.3. * ROAR_CD: Starts at approximately 0.05 at x=1.0, remains relatively stable around 0.05-0.10 between x=0.8 and x=0.3. ### Key Observations * Generally, as the attack strength decreases (moving from x=1.0 to x=0.3), the HIT@5 score decreases for all strategies. * BL_I and BL_II consistently outperform ROAR_I_p and ROAR_CD across all scenarios. * ROAR_CD consistently exhibits the lowest HIT@5 scores, indicating its limited effectiveness. * The performance difference between BL_I and BL_II is relatively small. * The "Default" attack strength (0.7) often shows a noticeable drop in performance compared to the stronger attack strength (0.9 or 1.0). ### Interpretation The data suggests that the BL (Baseline) strategies are more robust against both backdoor and targeted attacks compared to the ROAR strategies. The ROAR strategies, particularly ROAR_CD, demonstrate significantly lower performance, indicating their vulnerability to these attacks. The decreasing HIT@5 scores with decreasing attack strength suggest that the defenses become less effective as the attack becomes more subtle. The "Default" attack strength (0.7) appears to be a critical point where performance drops, potentially indicating a threshold where the defenses struggle to detect the attack. The consistent performance of BL_I and BL_II suggests that the second baseline strategy does not offer a substantial improvement over the first. These results highlight the need for more effective defense mechanisms against backdoor attacks, especially in scenarios involving commonsense reasoning (Freebase). The charts provide a comparative analysis of different strategies, allowing for informed decision-making regarding the selection of appropriate defenses based on the specific attack scenario and desired level of security.