# Return some error
    ...
```

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

### 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`.

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.smb;

import jcifs.CIFSException;

/**
 * Exception thrown when an SMB protocol downgrade attack is detected.
 * Indicates that the negotiated protocol version is lower than expected or required.
 *
 * @author mbechler
 *
 */
public class SMBProtocolDowngradeException extends CIFSException {

    /**

    # 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.

    # Return some error
    ...
```

Pero al usar `secrets.compare_digest()` será seguro contra un tipo de ataques llamados "timing attacks".

### Timing Attacks

¿Pero qué es un "timing attack"?

Imaginemos que algunos atacantes están tratando de adivinar el nombre de usuario y la contraseña.

Y envían un request con un nombre de usuario `johndoe` y una contraseña `love123`.

mc admin policy create myminio/ deny-invalid-sse-kms-pol ./docs/iam/policies/deny-objects-with-invalid-sse-kms-key-id.json

mc admin policy attach myminio deny-non-sse-kms-pol --user minio123
mc admin policy attach myminio deny-invalid-sse-kms-pol --user minio123
mc admin policy attach myminio consoleAdmin --user minio123

mc mb -l myminio/test-bucket
mc mb -l myminio/multi-key-poc

```
mc admin policy attach myminio getonly --user=newuser
```

### 3. Create a new group

```
mc admin group add myminio newgroup newuser
```

Once the group is successfully created you can now apply the `getonly` policy for this group.

```
mc admin policy attach myminio getonly --group=newgroup
```

### 4. Disable user

Disable user `newuser`.

./mc admin user add myminio/ minio12345 minio12345

./mc admin policy create myminio/ rw ./docs/distributed/rw.json
./mc admin policy create myminio/ lake ./docs/distributed/rw.json

./mc admin policy attach myminio/ rw --user=minio123
./mc admin policy attach myminio/ lake --user=minio12345

./mc mb -l myminio/versioned

./mc mirror internal myminio/versioned/ --quiet >/dev/null

## Soft delete (creates delete markers)

	}

	userReq := madmin.PolicyAssociationReq{
		Policies: []string{"readwrite"},
		User:     accessKey,
	}
	if _, err := s.adm.AttachPolicy(ctx, userReq); err != nil {
		c.Fatalf("Unable to attach policy: %v", err)
	}

	newSSHCon := newSSHConnMock(accessKey + "=svc")
	_, err = sshPasswordAuth(newSSHCon, []byte("invalid"))
	if err == nil || !errors.Is(err, errAuthentication) {

		}

		userReq := madmin.PolicyAssociationReq{
			Policies: []string{policy},
			User:     accessKey,
		}
		if _, err := s.adm.AttachPolicy(ctx, userReq); err != nil {
			c.Fatalf("Unable to attach policy: %v", err)
		}

		accessKeys[i] = accessKey
		secretKeys[i] = secretKey
	}

	g := errgroup.Group{}
	for i := range userCount {
		g.Go(func(i int) func() error {
			return func() error {

import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Pre-authentication Integrity Negotiate Context.
 *
 * This negotiate context is used in SMB 3.1.1 to establish
 * pre-authentication integrity protection against downgrade attacks.
 *
 * @author mbechler
 */
public class PreauthIntegrityNegotiateContext implements NegotiateContextRequest, NegotiateContextResponse {

    /**
     * Context type
     */