* Parses the role set from a string.
     * @param value The string to parse.
     * @param encrypted Whether the string is encrypted.
     * @param roleSet The set of roles.
     */
    protected void parseRoleSet(final String value, final boolean encrypted, final Set<String> roleSet) {
        String rolesStr = value;
        if (encrypted && cipher != null) {
            try {
                rolesStr = cipher.decryptoText(rolesStr);

                // SECURITY WARNING: Unsecure basic authentication is enabled by default.
                // This sends credentials in Base64 encoding over potentially unencrypted connections.
                // For production, it is STRONGLY RECOMMENDED to set spnego.allow.unsecure.basic to false
                // and use HTTPS or more secure authentication methods.

    /** Queries field name. */
    public static final String QUERIES = "queries";

    /** Virtual hosts field name. */
    public static final String VIRTUAL_HOSTS = "virtualHosts";

    /** Prefix for encrypted/ciphered values. */
    public static final String CIPHER_PREFIX = "{cipher}";

    /** System user identifier. */
    public static final String SYSTEM_USER = "system";

    /** Empty user ID placeholder. */