Spaces:
Running
Running
equation
Browse files- index.html +5 -5
index.html
CHANGED
|
@@ -420,15 +420,15 @@
|
|
| 420 |
<div class="column has-text-justified">
|
| 421 |
<p>
|
| 422 |
Attackers can design adaptive attacks to try to bypass BEYOND when the attacker knows all the parameters of the model
|
| 423 |
-
and the detection strategy. For an SSL model with a feature extractor $
|
| 424 |
-
the classification branch can be formulated as $
|
| 425 |
To attack effectively, the adversary must deceive the target model while guaranteeing the label consistency and representation similarity of the SSL model.
|
| 426 |
|
| 427 |
-
where $
|
| 428 |
-
and the linear augmentation function $
|
| 429 |
Note that we guarantee the generated neighbors are fixed each time by fixing the random seed. The adaptive adversaries perform attacks on the following objective function:
|
| 430 |
|
| 431 |
-
where $
|
| 432 |
</div>
|
| 433 |
</div>
|
| 434 |
|
|
|
|
| 420 |
<div class="column has-text-justified">
|
| 421 |
<p>
|
| 422 |
Attackers can design adaptive attacks to try to bypass BEYOND when the attacker knows all the parameters of the model
|
| 423 |
+
and the detection strategy. For an SSL model with a feature extractor $f$, a projector $h$, and a classification head $g$,
|
| 424 |
+
the classification branch can be formulated as $\mathbb{C} = f\circ g$ and the representation branch as $\mathbb{R} = f\circ h$.
|
| 425 |
To attack effectively, the adversary must deceive the target model while guaranteeing the label consistency and representation similarity of the SSL model.
|
| 426 |
|
| 427 |
+
where $\mathcal{S}$ represents cosine similarity, $k$ represents the number of generated neighbors,
|
| 428 |
+
and the linear augmentation function $W(x)=W(x,p);~p\sim P$ randomly samples $p$ from the parameter distribution $P$ to generate different neighbors.
|
| 429 |
Note that we guarantee the generated neighbors are fixed each time by fixing the random seed. The adaptive adversaries perform attacks on the following objective function:
|
| 430 |
|
| 431 |
+
where $\mathcal{L}_C$ indicates classifier's loss function, $y_t$ is the targeted class, and $\alpha$ refers to a hyperparameter.
|
| 432 |
</div>
|
| 433 |
</div>
|
| 434 |
|