The social media platforms of Skype have been hacked
by a group claiming to be the Syrian Electronic Army (SEA).
The group posted anti-surveillance messages, including
a message telling people not to use email services of Microsoft, the owner of
Skype.
It claimed "they are monitoring your accounts
and selling the data to the governments".
The hack comes after recent revelations about
surveillance programs being run by US intelligence agencies.
"Don't use Microsoft emails (hotmail, outlook).
They are monitoring your accounts and selling the data to the
governments," the hackers posted on Skype's Twitter account and its blog.
Skype acknowledged that it had been hacked but said
that "no user information was compromised".
The Syrian Electronic Army (SEA), which says it
supports President Bashar al-Assad, has been behind recent hack attacks on the
New York Times and Twitter.
The SEA has also targeted various other media
companies, including the BBC, CNN and the Guardian.
Last year, whistle-blower Edward Snowden leaked
documents which detailed the extent of surveillance programmes carried out by
the US National Security Agency (NSA).
According to the documents, the agencies had
"backdoor" access to the servers of nine major technology companies
including Microsoft, Yahoo, Google, Facebook, PalTalk, AOL, Skype, YouTube and
Apple.
All the companies named have denied their
involvement.
In Microsoft's case, the
Guardian newspaper claimed the documents showed that the
NSA had access to most of Microsoft's flagship products including Hotmail,
Outlook.com, Skydrive and Skype.
The NSA reportedly said in the documents that it had
improved its oversight of Skype so much that it could now collect three times
as many calls from the service than before.
Even before Skype was bought by Microsoft it was
providing information on some of its users through the surveillance program known as Prism, the report had claimed.
Since the revelations, Microsoft has teamed up with
seven other leading technology firms to form an alliance called Reform
Government Surveillance group.
The group which includes Google, Apple, Facebook,
Twitter, AOL, LinkedIn, and Yahoo, has called for "wide-scale
changes" to US government surveillance.
It has written a letter to the US President and
Congress arguing that current surveillance practice "undermines the
freedom" of people.