>
> Devil's advocate: under what use case does a user carry around a phone 
> that is powered off (if the battery is not dead)? 
>

Jeff, I think John meant just "screen on". In fact, even this is not 
enough- NFC polling is activated after unlocking the screen. 

John, seems like somebody made an app like this: 
http://www.sync-blog.com/sync/2012/02/this-app-can-unlock-your-android-lock-screen-using-nfc-tags.html
I don't know if it works.

W dniu czwartek, 6 grudnia 2012 17:43:50 UTC+1 użytkownik John McLear 
napisał:
>
> I'm proposing a method of unlocking the device by using an NFC 
> transponder.  NFC is becoming more widely adopted on handsets and as 
> some NFC transponders have built in security features ergo "unlock 
> with NFC" seems to be an obvious next step. 
>
> When the Android community talks about "unlocking" a phone is the 
> assumption that this is the user stage of unlock IE what you do when 
> you take the phone out of your pocket each time you use it? 
>
> NFC fails to read quite frequently so the patch would need to include 
> code to do fallback onto a secondary unlock mechanism IE a pin.  My 
> work is partly in the area of improving read reliability so as we move 
> forward this will become less of an issue.  Is unlock fallback 
> something that has been considered or is due in a future version? 
>
> I basically need to make a decision between writing a decent app to or 
> submitting a patch and was hoping the community could advise. 
>
> Once we have fleshed out some of the security implications I will post 
> on android-contrib. 
>
> If it helps I can ask some NFC forum advisers to share their thoughts 
> on security on this thread but I feel I should get a general opinion 
> on new unlocking mechanisms from the Android Security community first. 
>
> Thanks 
>
>
>
>
>
> John McLear 
>
> Originally posted here: 
>
> https://groups.google.com/group/android-platform/browse_frm/thread/48876689f8814e41/49a8d8658b21fb3d?lnk=gst&q=nfc+unlock#49a8d8658b21fb3d
>  
>

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