Apple's (NASDAQ:AAPL) developer website has been hacked, according to a message displayed on Apple's online developer portal. The site has been offline since last Thursday, when "an intruder" attempted to access personal information, according to the company.

Apple assured developers that their more sensitive information was encrypted, but noted that names, mailing addresses, and email addresses might have been revealed.

According to The Guardian, "Turkish security researcher" Ibrahim Balic has claimed responsibility, citing his desire to expose Apple's flawed security and privacy system. Balic's Twitter feed that The Guardian links to includes the tweet: "Apple hear our voice we dont have any bad intention!!!"  The Guardian reports the Apple site has 275,000 registered third-party developers.   

Apple added that "in order to prevent a security threat like this from happening again, we're completely overhauling our developer systems, updating our server software, and rebuilding our entire database. We apologize for the significant inconvenience that our downtime has caused you and we expect to have the developer website up again soon."