...while MS gave in to the NSA early on.
From the OP:
Its constitution enshrines the right to privacy and states that secrecy of correspondence is inviolable unless the law provides otherwise. Surveillance of communications in Luxembourg can only occur with judicial approval or by authorisation of a tribunal selected by the prime minister.
However, it is unclear whether Skype's transfer of communications to the NSA have been sanctioned by Luxembourg through a secret legal assistance or data transfer agreement that would not be known to the data protection commissioner at the start of their inquiry.
Microsoft's acquisition of Skype tripled some types of data flow to the NSA, according to top-secret documents seen by the Guardian.
Microsoft bought Skype for $8.5bn (£5.6bn) in 2011.
The US software giant was the first technology group to be brought within the NSA initative known as Prism, a scheme involving some of the internet's biggest consumer companies passing data on targeted users to the US under secret court orders.
Having once been considered a secure chat tool beyond the reach of government eavesdropping, Skype is now facing a backlash in the wake of the Prism revelations.
"The only people who lose are users," says Eric King, head of research at human rights group Privacy International. "Skype promoted itself as a fantastic tool for secure communications around the world, but quickly caved to government pressure and can no longer be trusted to protect user privacy."