} else {
                        // Other threads try to read password
                        String pwd = auth.getPassword();
                        // Password might be null if already wiped
                        assertTrue(pwd == null || pwd.equals("ConcurrentPass123!"));
                    }
                } catch (InterruptedException e) {

     */
    protected byte[] getNTHash() {
        MessageDigest md4 = Crypto.getMD4();
        char[] pwd = getPasswordAsCharArray();
        if (pwd == null || pwd.length == 0) {
            md4.update(Strings.getUNIBytes(""));
            return md4.digest();
        }

        String tempStr = new String(pwd);
        try {
            md4.update(Strings.getUNIBytes(tempStr));
            return md4.digest();

    // Patterns for sensitive data - compiled once and cached
    private static final Pattern PASSWORD_PATTERN = Pattern.compile(
            "(?i)(password|passwd|pwd|secret|token|key|credential|auth)([\"']?\\s*[:=]\\s*[\"']?)([^\"',\\s]+)", Pattern.CASE_INSENSITIVE);

    private static final Pattern IP_PATTERN = Pattern.compile("\\b(?:[0-9]{1,3}\\.){3}[0-9]{1,3}\\b");