Method generateSecret

/**
 * Generates a (semi-)random Secret Key for TOTP generation
 *
 * @return  string
 *
 * @note Since 3.9.25 we use the secure method "random_bytes" over the original insecure "rand" function.
 *       The random_bytes function has been backported to outdated PHP versions by the core shipped library paragonie/random_compat
 */
public function generateSecret()
{
    $secret = random_bytes($this->_secretLength);
    return $this->_base32->encode($secret);
}