Re: mobile phone + password = 2 factor auth?

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On Di Mai 26 2009, Jesse Keating wrote:
> On Tue, 2009-05-26 at 17:44 +0200, Till Maas wrote:
> > A problem with phones is, that they are typically not as secure as
> > hardware tokens. Users can install custom software on them. Also the
> > phone may be compromised via bluetooth. It might be even possible to
> > directly access text messages via bluetooth or maybe also wifi nowadays.
>
> Wouldn't that be why you have to combine what comes up on your phone
> with the password you know, so that just the phone alone can't get you
> in?

Here is another attack scenario: The attacker first attacks the desktop to 
obtain the password. But then he also compromises the phone once it is 
connected to the desktop to synchronize some data, e.g. contacts, music or 
software. Then the attacker got both factors without having physical access on 
the phone.

Regards
Till

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