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Phone's battery life can invade your privacy!

Jason

Voorhees a jolly good fellow!
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A little-known feature of the HTML5 specification means that websites can find out how much battery power a visitor has left on their laptop or smartphone – and now, security researchers have warned that that information can be used to track browsers online.

The battery status API is currently supported in the Firefox, Opera and Chrome browsers, and was introduced by the World Wide Web Consortium (W3C, the organisation that oversees the development of the web’s standards) in 2012, with the aim of helping websites conserve users’ energy. Ideally, a website or web-app can notice when the visitor has little battery power left, and switch to a low-power mode by disabling extraneous features to eke out the most usage.

W3C’s specification explicitly frees sites from needing to ask user permission to discover they remaining battery life, arguing that “the information disclosed has minimal impact on privacy or fingerprinting, and therefore is exposed without permission grants”. But in a new paper from four French and Belgian security researchers, that assertion is questioned.

The researchers point out that the information a website receives is surprisingly specific, containing the estimated time in seconds that the battery will take to fully discharge, as well the remaining battery capacity expressed as a percentage. Those two numbers, taken together, can be in any one of around 14 million combinations, meaning that they operate as a potential ID number. What’s more, those values only update around every 30 seconds, however, meaning that for half a minute, the battery status API can be used to identify users across websites.

For instance, if a user visits a website in Chrome’s private browsing mode using a VPN, the website should not be able to link them to a subsequent visit with private browsing and the VPN off. But the researchers warn that that may no longer work: “Users who try to revisit a website with a new identity may use browsers’ private mode or clear cookies and other client side identifiers. When consecutive visits are made within a short interval, the website can link users’ new and old identities by exploiting battery level and charge/discharge times. The website can then reinstantiate users’ cookies and other client side identifiers, a method known as respawning.”

Source: The Guardian
 
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JLXC

WTF's Official Conspiracy Fanatic
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LOL. Serious folks.

The Camera is always on, the mic is always on, everything on it is taken in real time, it's literally a tracking/spying device that people pay for and carry around. I hope this isn't news.


If it isn't news, and you've grown accustomed to it, or feel that it's just too convenient to give up, you are destroying your mind and body and paying for it. If you let cell phones and tablets stay near your children, or if they are using them, you are a bad parent who is hurting your own children and stupid to boot.

Too many people pretend to care about their children, while letting them use cell phones. You cannot do both. Look into truth.

Is there a reason Steve Jobs, and many other "tech wizards" keep them AWAY FROM THEIR OWN CHILDREN?

I think there is. They're just smart enough to know it's fucking you all up, permanently, and they don't want their own children damaged. Much like Doctors and vaccinating their own children.
 

CoprophagousCop

Only dead fish go with the flow.
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Steve Jobs did not let his children use iPads because he knew how addictive they could be. Some kids spend all day on their tablets and their parents are happy that it keeps their kids occupied. It had nothing to do with electromagnetic radiation. If cell phone radiation is penetrating children's brains, then it is penetrating all of our brains. Also, shout out to necro-posting.
 
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