When it comes time to part with their smartphone – the main task is to get rid of it all accumulated knowledge about you. It does not matter whether you sell the device or pass to a stranger relative inherited, it is perfect to what your contacts, photos, notes, passwords, and other personal information. It would seem that the cleaning procedure is no big deal – in every Android-smartphone for this function is provided reset to factory settings, which implies the complete destruction of all data from the device. However, it turns out that this is not true.
According to ArsTechnica , a group of researchers from the University of Cambridge have discovered in the course of the reset to factory settings error, as a result of which they managed to recover the data with a supposedly “clean” devices.
The study tested the device 21 from five different manufacturers, and they preserved the fragments of the old data even after resetting to factory settings. Moreover, 80% of the devices failed to restore “master token” that is used to access the Google-account user, resulting in a re able to sync contacts, emails and more.
It is estimated that about 500 million devices are not completely cleaned sections of their stores while leaving them information such as logins and passwords, emails, contacts and other files. About 630 million phones are not cleaned and memory card where users can store photos, videos and other confidential information.
There are several reasons: the lack of the necessary drivers to the structural features of flash drives, which are difficult to clean.
It is also worth noting that the study involved a device running Android to version 4.3. On whether there are similar problems in later versions of the operating system, data, respectively, no. However, given the still high prevalence of Jelly Bean and earlier green robot among users, it can really be a problem.
On materials androidcommunity