The location data appear to be collected using cellphone towers and Wi-Fi access points near a user's phone and don't appear to be transmitted back to Apple. Apple didn't immediately respond to a request for comment.
Still, the fact that the iPhone is collecting and storing location data-even when location services are turned off-is likely to renew questions about how well users are informed about the data being gathered by their cellphones. The fact that the iPhone stores months' worth of location data was disclosed by two researchers last week.
The discovery of an unencrypted location file on the iPhone created an uproar among people concerned that their phones could be searched and their location data used against them. On Saturday, Rep. Edward Markey (D., Mass.) called for a congressional investigation into the iPhone location storage, saying that unprotected location information on the phone could put children at risk from predators who hack their phones.
The discovery of the iPhone location file comes amid growing concern about cellphone tracking overall.
Last week, the Journal reported that Apple's iPhone and cellphones powered by Google Inc.'s Android software transmitted their locations back to Google and Apple, respectively.
And last year, a Journal investigation showed that many of the most popular cellphone "apps" go even further, sharing location data and other personal information with third-party companies without a user's knowledge or consent.
Apple and Google have both previously said that the data they receive is anonymous and that users can turn it off by disabling location services.
However, it appears that turning off location services doesn't disable the storage of location data on iPhones. The Journal tested the collection of data on an iPhone 4 that had been restored to factory settings and was running the latest version of Apple's iOS operating system.
The Journal disabled location services (which are on by default) and immediately recorded the data that had initially been gathered by the phone. The Journal then carried the phone to new locations and observed the data. Over the span of several hours as the phone was moved, it continued to collect location data from new places.
These data included coordinates and time stamps; however, the coordinates were not from the exact locations that the phone traveled, and some of them were several miles away. The phone also didn't indicate how much time was spent in a given location. Other technology watchers on blogs and message boards online have recorded similar findings.
Independent security researcher Ashkan Soltani verified the Journal's findings.
■単語
uproar
[名][U]((またan 〜))(群集の)騒動((over ...));わめき叫ぶ声;騒音
be in an uproar
大騒ぎをしている.
predator
[名]
1 生物(…の)捕食者;捕食動物((on ...)), 肉食動物.
2 略奪する人.
consent
[動](自)[I([副])][II that節/to do](…に)同意する,(…することを)承諾する,許可する;(…に)応じる,従う((to ...))
gladly [reluctantly] consent to a request
依頼を喜んで[いやいやながら]承諾する
He didn't consent to have her come here.
彼女をここに来させることに彼は同意しなかった
He consented that the matter should be discussed openly by everybody.
その問題がすべての人によって率直に論じられることに彼は同意した
Mother did not consent to my keeping rabbits.
母は私がウサギを飼うのを許してくれなかった.
━━[名][U]
1 (…への)同意,承諾,承認,賛成,許可((to ..., to do))
give one's consent to ...
…に同意する
a divorce by (mutual) consent
協議離婚
I need father's consent to drive the car.
その車を使うには父の許可がいる.
2 気持ち[意見,行動など]の一致
by common [mutual, general] consent [=((古))with one consent]
満場一致で.
[古フランス語←ラテン語consentre (con-共に+sentre感じる=同意する). △DISSENT, ASSENT]
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