How Internet detectives, and others, find out where you live

BRUSSELS Wed May 9, 2012 2:04am IST

People use computers at an internet cafe in Hefei, Anhui province June 8, 2010. REUTERS/Stringer/Files

People use computers at an internet cafe in Hefei, Anhui province June 8, 2010.

Credit: Reuters/Stringer/Files

Related Topics

Stocks

   

BRUSSELS (Reuters) - An explosion of people checking into social networks is being exploited by mobile application makers and private detectives, who say they can use people's online chatter and photos to track them and find out where they live.

In March, Apple (AAPL.O) stopped downloads of a "stalker" mobile application that told men where women around them were "hanging out", using only publicly available information from social networks.

But other readily available apps can do the same and more, say online investigators who use them.

When a person uses a mobile phone to post a tweet on Twitter or upload a photo to the image-hosting website Flickr, sometimes so-called geolocation data can be found lurking underneath the tweet or photo. This can be used to track down their local haunts, including their home or where they study.

"It is quite easy sometimes to work out which house a tweet is coming from," said Neil Smith, a former police officer turned online researcher in Britain.

Geolocation research is a fast evolving area as most applications are built on the back of freely available open-source software.

One of Smith's favourite applications was developed by 27-year-old Greek IT engineer Ioannis Kakavas, who aptly called his invention Creepy.

The free app collates geolocation data attached to a person's tweets and pictures to figure out where they might work, said Smith, who says he uses it to track down perpetrators of insurance fraud for corporate clients.

Police officers in Vancouver, Canada and in Arizona and Colorado in the United States also say they have used Creepy in their investigations.

An array of social networks like Twitter, Foursquare, Twitpic, Flickr, YFrog, Gowalla, and Lockerz can provide such geolocation data, Kakavas said.

UNWITTING EXPOSURE

Some of these websites allow users to disable geolocation, but those like Foursquare and Gowalla depend on it. Twitter users can choose to enable it when they join and Facebook says it strips off the location data on photos.

Smith, who says he has recently been hired by journalists who want to use geolocation data in their research, says his work is for "honourable, legal purposes".

For many parents, mobile apps that use geolocation can also be a source of reassurance: FamilyTracker and Life360 are two apps which show parents where their children are on a map.

But Smith and other professional snoops admit that many people oblivious to geolocation data can find themselves unwittingly exposed.

"Teenage girls are taking pictures of themselves unclothed and then sending them to their boyfriends," said Chris Hadnagy, a security expert and owner of social-engineer.com, a service which shows companies how vulnerable they might be to hacking.

"These photos may contain the location of where the photo was taken.

Regulators in the United States and the European Union have come out in force for new ways to protect people's privacy online, but geolocation data on social networks seems to be at anyone's fingertips without breaking the law.

"We have geolocation information that the users knowingly and deliberately make public," said Kakavas, who says he developed Creepy to show people how easy it can be for prying eyes to scrutinise their private lives.

But Smith cautioned: "If you don't care about your own security then don't be surprised by tools like Creepy which can harvest that information."

U.S. and EU regulators agree that people using the Internet should have the choice to stop websites from gathering their data to send them targeted ads.

To meet these demands advertising firms, web publishers and privacy experts have been meeting under the banner of the World Wide Web Consortium (W3C) to write an updated version of "Do Not Track", a tool users can install on their browser to stop online marketing companies from gathering their web browsing history.

But geolocation is more difficult to deal with.

"Because where someone is located may affect how they are treated under law, we cannot bar all geolocation," said Aleecia McDonald from the open source browser company Mozilla Firefox, a member of the W3C.

"However, we are agreed that very precise geolocation ... which gets down to about a dozen households, is not in keeping with the spirit of Do Not Track."

(Editing by Rex Merrifield and Jon Hemming)

FILED UNDER:
Photo

After wave of QE, onus shifts to leaders to boost economy

DAVOS, Switzerland - Central banks have done their best to rescue the world economy by printing money and politicians must now act fast to enact structural reforms and pro-investment policies to boost growth, central bankers said on Saturday.

Republic Day

Reuters Showcase

RK Laxman Dead

RK Laxman Dead

'Common Man' cartoonist RK Laxman dead at 93  Full Article 

Banking Revolution

Banking Revolution

India turns to corner shops, mobile phones for banking revolution.  Full Article 

Nuclear Group

Nuclear Group

China urges India to take steps to satisfy standards of NSG  Full Article 

Gold Market

Gold Market

Chinese gold demand holds up ahead of holiday, Indian buying weak  Full Article 

India-U.S. Relations

India-U.S. Relations

Column - U.S. and India should join to balance China's rise  Full Article 

Padma Bhushan

Padma Bhushan

India honours Bill Gates with civilian award  Full Article 

Fashionable Modi

Fashionable Modi

When Modi met Obama, his name was all over - his suit  Full Article 

New Greek PM

New Greek PM

Greek leftist Tsipras sworn in as PM to fight bailout terms  Full Article 

Australian Open

Australian Open

Venus fireworks illuminate Australia Day  Full Article 

Reuters India Mobile

Reuters India Mobile

Get the latest news on the go. Visit Reuters India on your mobile device  Full Coverage