Giai thich cac lo hong cua xac thuc hai yeu to duoi dang SMS va de xuat cac phuong an thay the nhu ung dung xac thuc va khoa bao mat. Huu ich cho nguoi di du lich muon giu so dien thoai o nuoc nha hoat dong khi o nuoc ngoai va can phuong phap an toan de nhan ma hoac duy tri truy cap tai khoan ma khong phu thuoc vao SMS.
