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Re: [tor-talk] Torbirdy



Why doesn't everyone just use UTC in the Date: header and then the
computer that the mail is being read on converts it to local time? This
just makes it so people can spy on where you are/

> On 1/27/15, Dave Warren <davew@hireahit.com> wrote:
>> On 2015-01-26 03:10, Cypher wrote:
>>> Also, since the only
>>> data leaked seems to be the local datetime, I'd think it's not a
>>> massive
>>> concern since my local datetime is shared with a few million other
>>> people.
>>
>> While true, the time*zone* is also mentioned, and timezones can be a
>> more interesting kettle of proverbial fish. Timezone rules vary from
>> region to region, and so upon observing the dates your DST rules apply,
>> I might determine your country or geopolitical location more
>> specifically then just a 1/24th slice of the planet (plus all those
>> funky :30 zones)
>>
>> More complicated is when you travel, if you update the timezone on your
>> machine, this information is leaked too, so over time, your timezone
>> information may actually reveal your travel to a very broad degree.
>> Chances are that it would only take a very small number of
>> cross-timezone trips for a gov't actor to correlate your timezone shifts
>> with your travel itinerary, assuming such information is made available
>> now or in the future.
>>
>
> Of course, which is why we note that this is an issue, one which must
> be fixed in Thunderbird sadly.
>
>> For most people, it's probably not a major risk, but for those who's
>> livelihood or freedom relies upon anonymity, this is just the sort of
>> leak that Big Data can use.
>>
>
> Remember we're comparing Thunderbird without TorBirdy vs with
> TorBirdy: it is strictly better, even if imperfect.
>
> All the best,
> Jacob
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