EU cloud data can be secretly accessed by US authorities
US-owned companies bound by Patriot Act, says Microsoft
Personal information belonging to EU users of US-owned cloud-based services could be shared with US law enforcers without the user being informed, Microsoft has said.
The software giant said it could not guarantee that it would not have to hand over EU customers' data on a new cloud service it has developed whilst keeping details of the data transfer secret.
Cloud services allow internet users to store data online instead of locally.
EU data protection laws state that organisations must tell people when they are asked to disclose their personal information.
These EU provisions might conflict with obligations US-based firms, such as Microsoft, face under US law.
The USA Patriot Act gives law enforcement authorities the right to access personal data held by US-based companies, regardless of where it is stored in the world. The Act also gives law enforcers the right to prevent firms informing the customer that they have had to hand over the information. The controversial law was established as an anti-terrorism tool.
Microsoft is set to launch a new cloud service next week. It said it will allocate its customers a region where their information will be physically stored, but said it could not guarantee that it would tell EU customers' details if US authorities sought access to their data.
"As a general rule, customer data will not be transferred to data centers outside that region," Microsoft said in an explanation about geographic boundaries for its new service.
"There are, however, some limited circumstances where customer data might be accessed by Microsoft personnel or subcontractors from outside the specified region (eg, for technical support, troubleshooting, or in response to a valid legal subpoena)," the explanation said.
The USA Patriot Act caused controversy in Canada in 2008 when a Canadian university told its staff and students not to send private data over an email system.
The system was outsourced to the US, prompting staff to lodge an official grievance against the university.
Staff complained that the fact that their emails are routed through the US meant their contents were vulnerable to interception by US authorities.
Microsoft can already transfer personal data from Europe to the US under a special agreement drawn up by the European Commission and US Department of Commerce.
The Safe Harbor scheme allows US companies that meet the requirements of the EU's Data Protection Directive to transfer EU data to the US.
EU companies are generally prohibited from transferring personal data to countries outside the European Economic Area unless there is adequate protection for that data.
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