The Republican frontrunner goes by the code name "mogul," although he once said he would prefer "humble"

He’s volatile, savvy and, some say, scary. But who is the real Donald Trump? In a series of interviews with dozens of friends, foes, and the Republican presidential candidate himself, a PEOPLE special report examines the truth about the man behind the bluster.

Turns out Donald Trump‘s Secret Service code name isn’t quite so secret.

Get push notifications with news, features and more.

Although the Republican frontrunner once said he would choose the name “Humble” for himself, the 69-year-old says the agency instead chose a name some might consider a bit more fitting: Mogul.

“That’s true,” the real estate tycoon tells PEOPLE for this week’s cover story when asked to confirm the rumored code name. “I didn’t choose it. They chose it. They use it. That is true.”

WATCH: People Reporter Who Sat Down With Donald Trump Tells Us What She Witnessed

The Secret Service has been protecting major presidential candidates and their spouses since the assassination of Robert F. Kennedy in 1968.

“Protection of a candidate/nominee is designed to maintain the integrity of the democratic process and continuity of government,” the agency says on its website.

For much more of our special report on Donald Trump, pick up this week’s issue of PEOPLE, on newsstands Friday

A Secret Service source tells PEOPLE Trump’s wife, Melania, does not yet receive official protection because she does not travel with the candidate. However, Trump didn’t balk at PEOPLE’s suggestion for her code name if and when the time comes: “Model.” (He doesn’t yet have a name in mind for son Barron.)