public void secureWipeKeys() {
        if (this.encryptionKey != null) {
            // Multi-pass secure wipe for enhanced security
            SecureKeyManager.secureWipe(this.encryptionKey);
            this.encryptionKey = null;
        }
        if (this.decryptionKey != null) {
            // Multi-pass secure wipe for enhanced security
            SecureKeyManager.secureWipe(this.decryptionKey);
            this.decryptionKey = null;

 */
package jcifs.util;

import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.SecureRandom;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.DestroyFailedException;

    private static final String MESSAGE =
        "Guava cannot securely create temporary files or directories under SDK versions before"
            + " Jelly Bean. You can create one yourself, either in the insecure default directory"
            + " or in a more secure directory, such as context.getCacheDir(). For more information,"
            + " see the Javadoc for Files.createTempDir().";

import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.DestroyFailedException;
import javax.security.auth.Destroyable;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Secure credential storage with encryption at rest.
 *
 * Provides secure storage of passwords and other sensitive credentials
 * using AES-GCM encryption with PBKDF2 key derivation.
 *

 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2;

import java.security.GeneralSecurityException;
import java.security.MessageDigest;
import java.util.concurrent.locks.ReentrantLock;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@GwtIncompatible
@J2ObjCIncompatible // java.nio.file
public enum RecursiveDeleteOption {
  /**
   * Specifies that the recursive delete should not throw an exception when it can't be guaranteed
   * that it can be done securely, without vulnerability to race conditions (i.e. when the file
   * system does not support {@link SecureDirectoryStream}).
   *
   * <p><b>Warning:</b> On a file system that supports symbolic links, it is possible for an

        // Then
        assertNotNull(nonce1, "First secure nonce should not be null");
        assertNotNull(nonce2, "Second secure nonce should not be null");
        assertFalse(Arrays.equals(nonce1, nonce2), "Secure nonces should be different");
        assertTrue(nonce1.length > 0, "Secure nonce should have proper length");
    }

    @Test
    @DisplayName("Should handle concurrent secure nonce generation safely")

   and the old credentials had to be removed once the rotation completed. This process is now gone.
   The root credentials can now be changed easily.

> Does this mean I need an enterprise KMS setup to run MinIO (securely)?

No, MinIO does not depend on any third-party KMS provider. You have three options here:

- Run MinIO without a KMS. In this case all IAM data will be stored in plain-text.

Author: Harshavardhana <******@****.***>
Date:   Sat Jun 15 11:27:17 2019 -0700

    [security] Match ${aws:username} exactly instead of prefix match (#7791)

    This PR fixes a security issue where an IAM user based
    on his policy is granted more privileges than restricted
    by the users IAM policy.

    This is due to an issue of prefix based Matcher() function

            }
        } finally {
            correctAuth.close();
            wrongAuth.close();
        }
    }

    /**
     * Test that null and empty password comparisons are handled securely.
     */
    @Test
    public void testNullAndEmptyPasswordSecurity() {
        NtlmPasswordAuthenticator auth1 = new NtlmPasswordAuthenticator("domain", "user", (String) null);