German authorities are investigating a hacking group that leaked hotel reservation information on the country, as well as details on its airlines, hotels and other travel services.
The group’s website had been hacked on Thursday.
The information included a reservation code, as many hotel reservations are, but the data was encrypted and was sent over the Internet to an unknown hacker.
A spokesman for the interior ministry, Martin Pohl, said the hacker used an unknown software to upload the data.
He added that the government was “still investigating.”
The incident highlights how sensitive information can be, and the risk of compromising it.
German Chancellor Angela Merkel, who leads the center-right Christian Democrats (CDU), and the opposition Social Democrats (SPD) have criticized the leak.
“We are not going to accept the theft of our hotel reservation data,” Merkel said on Friday.
“The German government is already working on new security measures.”
The group had leaked the data in the hope of getting more information on Germany’s tourism industry, said Interior Minister Christian Schmidt.
The data was then posted on the internet, and other people could access it.
The government is also looking into whether the hack was related to a German parliamentary vote in which lawmakers voted to tighten immigration restrictions.