According to cybersecurity experts and even hackers themselves, both Obama’s government emails and Clinton’s private, encrypted email system are secure enough to withstand the attack from foreign powers. For example, Obama carries a specially secured BlackBerry device, which so far has proved safe from cyber spies.

Even the National Security Agency admitted that the president’s BlackBerry has a satisfactory level of security. Recently, the US government had to admit that hackers attacked systems at the Pentagon, the White House and the State Department, but the breach in question related to the lowest-level unclassified email.

Meanwhile, controversy continues to rage over Hillary Clinton using a private email system while serving as the secretary of state. Nicknamed her “home brew” clintonemail.com system, it has sophisticated cyber “shields” to protect Clinton’s emails from prying eyes. The private domain has been used by her to conduct government business for four years, though it is not clear to what extent. Perhaps, now she would not be using this system as much, because it can appear vulnerable to some kind of hack, although it has still not been knocked offline or breached.

At the moment, the security experts are trying to work out how the hackers gained access to White House communications recently. One suggestion is that they could have infected the computer systems through the staffers while they were working on government business outside the office. Another suggestion is that they used an intrusion method called social engineering in order to lure staffers into clicking on a malicious link.