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| You have an access card and with it you can access restricted parts of the company you are working in. | If you leave your access card on the bench in the park where you had lunch ... |
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| ... you can no longer access restricted parts and not get to your working place. | However, someone finding your access card is granted access. |
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| Multiple personal devices together allow you access to restricted parts of the company you are working in. | If you leave your access card on the bench in the park where you had lunch ... |
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| ... you can still access restricted parts and get to your working place. | Someone finding only your access card is not granted access. |
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| Your laptop contains sensitive data. | A burglar breaks in after midnight ... |
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| ... and steals your laptop. | Not only he has your laptop, he also has access to your sensitive data. |
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| Your laptop contains sensitive data. If you want to view/work on this data you need multiple personal devices together. | A burglar breaks in after midnight ... |
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| ... and steals only your laptop. | He has your laptop, but he has no access to your sensitive data. |
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This study focusses on the required interactions to update your set of personal devices. This includes adding a device to your personal devices, removing a device from your personal devices and refreshing the shared key. Thank you for willing to participate, Roel |