DiddyDiddy has an enemy … and it seems to be someone close to him, and it wants to find out who it is.

Someone recently stole the numbers to his personal American Express Black Card and posted them on a web site this week, according to TMZ.

Earlier this week, someone posted copies of the hip-hop mogul’s personal credit card on a website, along with his passport and private phone numbers.

In the post, on the unknown website, there’s a reference to Diddy’s rumored allegiance to the secret society known as the Illuminati, who many believe run the world behind the curtain of government.

Sources tell TMZ that Diddy is aware of the leak of his info, and has launched an internal investigation to find the person responsible.

Official comment from Diddy’s camp was not issued at press time.