As a PS to my previous post, I've just noticed that the Wikipedia article 
on oAuth says: "OAuth 2.0 has had numerous security flaws exposed in 
implementations.[15] The protocol itself has been described as inherently 
insecure by security experts and a primary contributor to the specification 
stated that implementation mistakes are almost inevitable." Doesn't that 
mean that I would actually more secure, rather than less secure, if I type 
my password to sign in rather than using oAuth?

Dave


On Wednesday, 18 January 2017 16:08:26 UTC, Dave Rado wrote:
>
> Many thanks, Philip. I'm confused, though.
>
> First of all, I've just looked up oAuth on Wikipedia and the explanation 
> of how it works went over my head - I don't understand how it can be 
> possible for my to authorise access without supplying a password.
>
> But secondly, whenever I log into Google or Chrome or Gmail, I am asked 
> for a password - so if Google themselves make me type my password, in order 
> to sign in, how is that any different from me typing my password in the K-9 
> Mail sign-in screen when adding my Gmail account to K-9 Mail?
>
> Finally and most importantly for me in the short term, are there any 
> serious risks for me if I choose the setting to turn on  on access to "less 
> secure" apps that Google offered me but said it didn't recommend me to 
> choose? Or can I safely do this?
>
> As a follow-up to the last question above, if you do consider that it's 
> safe to choose this setting but consider that it will be safer still to 
> change it once K-9 Mail incorporates oAuth, will it be straightforward for 
> me to change the setting then? I can't see any way to get to webpage where 
> the setting is, other than by following the link from the email Google sent 
> me, which won't be a valid link in the long term.
>
> Dave
>
> On Wednesday, 18 January 2017 15:54:33 UTC, Philip Whitehouse wrote:
>>
>> The less-secure sign in means an app that doesn't use OAuth and instead 
>> require you to provide your password.
>>
>> I've done some work to support this in K-9 (
>> https://github.com/k9mail/k-9/issues/655). pEp have chosen to merge this 
>> code, despite the fact it's fairly unfinished. K-9 needs some UI work and 
>> testing of this feature, that will hopefully land in a future stable 
>> release.
>>
>> Other apps may implement the protocol, I'm not sure which though.
>>
>> - Philip Whitehouse
>>
>> On Tuesday, 17 January 2017 22:49:41 UTC, Dave Rado wrote:
>>>
>>> I'm trying to add my recently created Gmail account as a second email 
>>> account in K-9 Mail, but when I tried to add it, I was prevented from 
>>> signing in - the sign-in screen said that my password was incorrect, 
>>> although it wasn't; and a few seconds later I received an email from Google 
>>> saying:
>>>
>>> "Google just blocked someone from signing into to your Google account 
>>> from an app that may put your account at risk." Then if I click the link to 
>>> confirm that it was me who had tried to sign in, it took me to a webpage 
>>> that states: "Some apps use less secure sign-in technology which makes your 
>>> account more vulnerable. You can turn off access for these apps, which we 
>>> recommend, or turn on access if you want to use them despite the risks."
>>>
>>>
>>> It then gives me the option to turn on access to "less secure" apps (not 
>>> just to K-9 mail but to *all "*less secure" apps, which I find scary).
>>>
>>> Interestingly, I was able to add my Gmail account to the stock Android 
>>> email app without any problems, so presumably that app uses what Google 
>>> regards as a "more secure sign-in technology" - but I don't like the stock 
>>> email app, which is why I got K-9 Mail in the first place.
>>>
>>> Does Google have reasonable grounds for claiming that K-9 Mail "uses a 
>>> less secure sign-in technology"? Are the risks real or imaginary? And if I 
>>> select the option to turn on access to *all* less secure apps, am I 
>>> taking a serious risk? If so, what non-Google email clients for Android are 
>>> available that use what Google would regard as a "more secure sign-in 
>>> technology" and which have comparable functionality to K-9 Mail?
>>>
>>> Dave
>>>
>>

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