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| There have been concerns over surveillance programmes in the US |
Eight firms, Google, Apple, Facebook, Twitter, AOL, Microsoft, LinkedIn, and Yahoo, have formed an alliance called Reform Government Surveillance group.
The group has written a letter to the US President and Congress arguing that current surveillance practice "undermines the freedom" of people.
It comes after recent leaks detailed the extent of surveillance programmes.
"We understand that governments have a duty to protect their citizens. But this summer's revelations highlighted the urgent need to reform government surveillance practices worldwide," the group said in an open letter published on its website.
"The balance in many countries has tipped too far in favour of the state and away from the rights of the individual - rights that are enshrined in our Constitution.
"This undermines the freedoms we all cherish. It's time for a change," it added.
Limited surveillance
The move by the eight firms comes after whistle-blower Edward Snowden leaked information about surveillance carried out by the US government.
Mr Snowden, an ex-US intelligence contractor, leaked documents to the media highlighting the various methods used by agencies to gather information.
"Reports about government surveillance have shown there is a real need for greater disclosure and new limits on how governments collect information," said Mark Zuckerberg, chief executive of Facebook, the world's biggest social networking firm.
"The US government should take this opportunity to lead this reform effort and make things right."
Source : BBC News
