Privacy is dead - and it's never going to come back?

Imagine a world where mosquito-sized robots fly around stealing samples of your DNA. Or where a department store knows from your buying habits that you're pregnant even before your family does.

That is the terrifying dystopian world portrayed by a group of Harvard professors at the World Economic Forum in Davos on Thursday, where the assembled elite heard that the notion of individual privacy is effectively dead.

"Welcome to today. We're already in that world," said Margo Seltzer, a professor in computer science at Harvard University.

"Privacy as we knew it in the past is no longer feasible... How we conventionally think of privacy is dead," she added.

Another Harvard researcher into genetics said it was "inevitable" that one's personal genetic information would enter more and more into the public sphere.

Sophia Roosth said intelligence agents were already asked to collect genetic information on foreign leaders to determine things like susceptibility to disease and life expectancy.

"We are at the dawn of the age of genetic McCarthyism," she said, referring to witch-hunts against Communists in 1950s America.

What's more, Seltzer imagined a world in which tiny robot drones flew around, the size of mosquitoes, extracting a sample of your DNA for analysis by, say, the government or an insurance firm.

Invasions of privacy are "going to become more pervasive," she predicted.

"It's not whether this is going to happen, it's already happening... We live in a surveillance state today."

'Nasty little cousin'

Political scientist Joseph Nye tackled the controversial subject of encrypted communications and the idea of regulating to ensure governments can always see even encrypted messages in the interests of national security.

"Governments are talking about putting in back doors for communication so that terrorists can't communicate without being spied on. The problem is that if governments can do that, so can the bad guys," Nye told the forum.

"Are you more worried about big brother or your nasty little cousin?"

However, despite the pessimistic Orwellian vision, the academics were at pains to stress that the positive aspects of technology still far outweigh the restrictions on privacy they entail.

In the same way we can send tiny drones to spy on people, we can send the same machine into an Ebola ward to "zap the germs," Seltzer said.

"The technology is there, it is up to us how to use it," she added.

"By and large, tech has done more good than harm," she said, pointing to "tremendous" advances in healthcare in some rural areas of the developing world that have been made possible by technology.

And at a separate session on artificial intelligence, panellists appeared to accept the limit on privacy as part of modern life.

Rodney Brooks, chairman of Rethink Robotics, an American tech firm, took the example of Google Maps guessing -- usually correctly -- where you want to go.

"At first, I found that spooky and kind of scary. Then I realised, actually, it's kind of useful," he told the forum.

Anthony Goldbloom, a young tech entrepreneur, told the same panel that what he termed the "Google generation" placed far less weight on their privacy than previous generations.

"I trade my privacy for the convenience. Privacy is not something that worries me," he said.

"Anyway, people often behave better when they have the sense that their actions are being watched."

The World Economic Forum in the swanky Swiss ski resort of Davos brings together some 2,500 of the global business and political elite for a meeting that ends Saturday.

Chomsky: We Are All – Fill in the Blank.

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