Amy Winehouse's website was hijacked this morning by a group of hackers -- who claim they targeted the singer because they want to "take back the internet from the white devil."



The hacker group behind the e-vandalism -- who call themselves SwagSec -- took to Twitter this morning to gloat, posting a link to Amy's website ... showcasing their online dirty work.



SwagSec -- which took over Amy's website with a bizarre expletive-filled hacker-speak rant -- claims the goal is to "take back the Internet from the white devil" ... adding, "DEATH 2 THE WHITE DEVIL."

As of this posting, the site still hasn't been fixed. So far, no word back from Winehouse's camp.