Menu
Wi-Fi access point scans can betray a person's location

Wi-Fi access point scans can betray a person's location

A new study warns that Wi-Fi data collected by applications could be used for tracking

A new study warns that Wi-Fi data collected by Android applications could be used to figure out a person's location most of the time.

A new study warns that Wi-Fi data collected by Android applications could be used to figure out a person's location most of the time.

Many Android applications collect information on Wi-Fi access points, which researchers contend can be used to figure out where a person is more than 90 percent of the time.

The privacy implications of Wi-Fi access point scanning is often overlooked but presents a risk if the information is abused, according to the study, written by the Technical University of Denmark, the Massachusetts Institute of Technology and the University of Copenhagen.

Wi-Fi information isn't considered location data, and Android applications such as Candy Crush Saga, Pandora and Angry Birds routinely collect it.

"This makes it possible for third party developers to collect high-resolution mobility data under the radar, circumventing the policy and the privacy model of the Android ecosystem," wrote Sune Lehmann, an associate professor at DTU Informatics at the Technical University of Denmark, in a blog post.

The study said it wasn't suggesting that Candy Crush Saga, Pandora and Angry Birds collected Wi-Fi scans for location purposes but that they would, in theory, have the ability to do so.

Location data is seen as valuable for purposes such as advertising, where context-specific ads can be shown as a person moves into a certain area. But that sort of tracking has raised privacy concerns over how users are notified that the tracking is taking place and if they can opt out.

The researchers tracked 63 students over six months. Since people tend to have regular movement patterns, "a few most prevalent routers can work effectively as proxies for their location," the study said.

A third party that can get access to Wi-Fi access point scans from a device without authorized access to location data can still "effectively determine the location of each individual 90 percent of the time." For some students, just four access points could describe their approximate location most of the time, it said.

Android applications usually have a set of permissions that someone who installs an app must approve. But the permission for Wi-Fi scanning is separate from the one asking for location data, and granting the permission generally isn't considered risky, the study said.

The study notes that Apple introduced in iOS 8 a method to make it more difficult for Wi-Fi access points to collect consistent data on devices. iOS 8 will spoof a device's MAC (media access control) address.

But Lehmann wrote that Apple's method doesn't address the problem in the study "where data is collected by an application on the phone, not by external devices."

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk

Follow Us

Join the New Zealand Reseller News newsletter!

Error: Please check your email address.

Tags Technical University of DenmarksecurityMassachusetts Institute of TechnologyUniversity of Copenhagen

Slideshows

Top 50 defining moments of the New Zealand channel in 2016

Top 50 defining moments of the New Zealand channel in 2016

Reseller News looks back on a tumultuous 12 months for the New Zealand channel, assessing the fallout from a year of sizeable industry change. Whether it be local or global mergers and acquisitions, distribution deals or job changes, the channel that started the year differs somewhat to the one set to finish it - Reseller News assesses the key moments that made 2016.​

Top 50 defining moments of the New Zealand channel in 2016
​Hewlett Packard Enterprise honours high achieving NZ channel

​Hewlett Packard Enterprise honours high achieving NZ channel

Hewlett Packard Enterprise honoured its top performing Kiwi partners at the second running of its HPE Partner Awards in New Zealand, held at a glitzy ceremony in Auckland. Recognising excellence across eight categories - from distributors to resellers - the tech giant celebrated its first year as a standalone company, following its official split from HP in 2015.

​Hewlett Packard Enterprise honours high achieving NZ channel
Nutanix treats channel partners to Christmas cruise

Nutanix treats channel partners to Christmas cruise

Nutanix recently took to the seas for a Christmas Cruise around Sydney Harbour with its Australia and New Zealand staff, customers and partners to celebrate a stellar year for the vendor. With the sun out, they were all smiles and mingled over drinks and food.

Nutanix treats channel partners to Christmas cruise
Show Comments