### Hardware attacks

Physical GPUs or TPUs can also be the target of attacks. [Published
research](https://scholar.google.com/scholar?q=gpu+side+channel) shows that it
might be possible to use side channel attacks on the GPU to leak data from other
running models or processes in the same system. GPUs can also have
implementation bugs that might allow attackers to leave malicious code running

    # Return some error
    ...
```

But by using the `secrets.compare_digest()` it will be secure against a type of attacks called "timing attacks".

### Timing Attacks

But what's a "timing attack"?

Let's imagine some attackers are trying to guess the username and password.

And they send a request with a username `johndoe` and a password `love123`.

    Optional<Path> getPath(Project project);

    /**
     * Returns an immutable collection of attached artifacts for given project.
     */
    @Nonnull
    Collection<ProducedArtifact> getAttachedArtifacts(Project project);

    /**
     * Returns project's all artifacts as immutable collection. The list contains all artifacts, even the attached ones,

        Please open Android-related issues on [the Android Issue Tracker](https://source.android.com/source/report-bugs)
        Please open IntelliJ-related issues on [the JetBrains Issue Tracker](https://youtrack.jetbrains.com/newIssue?project=IDEA)

		return errServerNotInitialized
	}

	started := tracker.Started
	if started.IsZero() || started.Equal(timeSentinel) {
		healingLogIf(ctx, fmt.Errorf("unexpected tracker healing start time found: %v", started))
		started = time.Time{}
	}

	// Final tracer update before quitting
	defer func() {
		tracker.setObject("")
		tracker.setBucket("")
		healingLogIf(ctx, tracker.update(ctx))
	}()

		tracker.resetHealing()
		bugLogIf(ctx, tracker.update(ctx))

		return errRetryHealing
	}

	if tracker.ItemsFailed > 0 {
		healingLogEvent(ctx, "Healing of drive '%s' is incomplete, retried %d times (healed: %d, skipped: %d, failed: %d).", disk,
			tracker.RetryAttempts, tracker.ItemsHealed, tracker.ItemsSkipped, tracker.ItemsFailed)

    # Return some error
    ...
```

Porém, ao utilizar o `secrets.compare_digest()`, isso estará seguro contra um tipo de ataque chamado "timing attacks" (ataques de temporização).

### Ataques de Temporização

Mas o que é um "timing attack" (ataque de temporização)?

Vamos imaginar que alguns invasores estão tentando adivinhar o usuário e a senha.

                                    }
                                )
                                | IsDict(
                                    # TODO: remove when deprecating Pydantic v1
                                    {
                                        "type": "string",
                                        "title": "Googall Tracker",
                                    }

            InputLocationTracker tracker) {
        if (!validateNotNull(prefix, fieldName, problems, severity, version, string, sourceHint, tracker)) {
            return false;
        }

        if (!string.isEmpty()) {
            return true;
        }

        addViolation(problems, severity, version, prefix + fieldName, sourceHint, "is missing.", tracker);

        return false;
    }

                                    }
                                )
                                | IsDict(
                                    # TODO: remove when deprecating Pydantic v1
                                    {
                                        "type": "string",
                                        "title": "Googall Tracker",
                                    }