This story was updated at 6:45 p.m. Monday.
WikiLeaks.org went back online late Monday after a private company stepped in to help the doument-sharing site, which had been offline for more than a week as the result of a massive distributed denial-of- service (DDoS) attack.
CloudFlare, a Web performance and security company, said it stepped into help after seeing WikiLeaks' request for help on Twitter.
An individual or group identifying itself as "Anti Leaks" has taken credit for the outage, which has also knocked out many WikiLeaks mirror sites.
Hacker group Anonymous, behind many of the DDoS attacks on government websites in the past, including the CIA, and which posted the hacked emails of law enforcement officials, said on one of its blogs:
We are now witnessing cyber wars, with most Wikileaks sites under sustained DDoS attack over several days. On one side are Wikileaks itself and it’s hactivist (sic) supporters, such as Anonymous. On the other side are US Govt supporters.
Anonymous, a strong supporter of WikiLeaks, provided "two ways" to access WikiLeaks information, one using Tor, an anonymous network; the other using a variety of mirror sites that have been set up but not yet attacked by AntiLeaks.
Among the sites is one called "Global Files," which features files some security experts speculate is the main reason behind the current WikiLeaks attacks.
The files are documents from intelligence firm Stratfor, which deal with a secret surveillance system in the U.S. called TrapWire. As Carole Theriault of Sophos Security wrote Monday, the WikiLeaks attacks happened after the group published "the latest of its Global Intelligence Files (GIF), discussing the implementation of TrapWire in public spaces in the US."
Meanwhile, AntiLeaks said Monday in a posting that Internet chatter that the group is U.S.-government backed is not true:
"We find the speculation that we are not behind these attacks and/or that we are CIA/NSA/FBI or even wikileaks themselves to be downright comical."