some ideas from Corona Virus "Stay at Home" order
Bob Rasmussen
ras at anzio.com
Mon Mar 23 14:50:51 PDT 2020
The premise of a certificate from a certificate authority is that it can
not be forged.
On Mon, 23 Mar 2020, Fairlight via Filepro-list wrote:
> I don't see how that hardens it. If you forge someone's signature, then
> lock the document you just signed their name to in a safe, it doesn't
> make the document any more valid.
>
> Until/unless they implement something like blockchain for photos, it's
> going to be an issue of trustworthiness.
>
> m->
>
>
> On Mon, Mar 23, 2020 at 01:43:42PM -0700, Bob Rasmussen via Filepro-list thus spoke:
>> Insurance photos is something I have thought about. Maybe for damage to a
>> car. Maybe before and after photos. Meaning you might need to verify
>> geolocation and also date/time the photo was taken. Maybe even the direction
>> the camera was pointing.
>>
>> To "harden" the proof, you could embed the JPG photo (containing the GEOTAG,
>> etc.) inside a PDF, which can then be certified (tied to a certificated
>> individidual, tied to a validated date/time clock, encrypted, and password
>> protected. When a certificate is applied to a PDF, that process hashes the
>> entire PDF, so that contents within can not be changed. I think this could
>> prove when and where the the picture was taken. I'm not sure what the
>> mechanism could be for validating the date/time clock.
>>
>> On Mon, 23 Mar 2020, Bruce Easton via Filepro-list wrote:
>>
>>> One might be extracting that info from photos for insurance purposes
>>> (i.e, homeowner's). I think underwriters want to store the geotagging
>>> info and not just store info like "more than five miles from the
>>> ocean". (Of course, I would think that info would be more readily
>>> available from something other than a photo.)
>>>
>>> On 3/23/20 1:41 PM, Bob Rasmussen via Filepro-list wrote:
>>>> On the topic of GPS coordinates: what use case can you think of for
>>>> this? I've been aware of geotagging (an dother EXIF data) in photos
>>>> and videos for years, and have written code to extract that data
>>>> from the files, but have not come up with many use cases. Ideas?
>>>>
>>>> On Mon, 23 Mar 2020, Richard D. Williams via Filepro-list wrote:
>>>>
>>>>> Sometimes I think of some neat things I've done over the years
>>>>> and just feel like sharing.
>>>>>
>>>>> Here are a few: (linux OS)
>>>>>
>>>>> Merge PDFs into a single new PDF:
>>>>> /usr/bin/gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite
>>>>> -sOutputFile=file_new.pdf file1.pdf file2.pdf
>>>>>
>>>>> Extract Pages from a PDF:
>>>>> i.e. page 1-4
>>>>> /usr/bin/gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -dFirstPage=1
>>>>> -dLastPage=4 -sOutputFile=file_new.pdf file1.pdf
>>>>>
>>>>> Extract Pages from page # to end:
>>>>> /usr/bin/gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -dFirstPage=2
>>>>> -sOutputFile=file_new.pdf file1.pdf
>>>>>
>>>>> Get the numbers of pages in a PDF:
>>>>> /usr/bin/pdfinfo file1.pdf | grep "Pages:" | sed s/"Pages:"//g |
>>>>> sed s/" "//g
>>>>> i.e.
>>>>> 8
>>>>>
>>>>> Get the Lat/Long from a JPG image:
>>>>> exiftool -n -gpslatitude -gpslongitude file2.JPG
>>>>> i.e.
>>>>> GPS Latitude : 31.4998652777778
>>>>> GPS Longitude : -100.448014444444
>>>>>
>>>>> I hope someone finds this useful.
>>>>>
>>>>> Be safe out there,
>>>>>
>>>>> Richard D. Williams
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
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>>>>
>>>> Regards,
>>>> ....Bob Rasmussen, President, Rasmussen Software, Inc.
>>>>
>>>> personal e-mail: ras at anzio.com
>>>> company e-mail: rsi at anzio.com
>>>> voice: (US) 503-624-0360 (9:00-6:00 Pacific Time)
>>>> fax: (US) 503-624-0760
>>>> web: http://www.anzio.com
>>>> street address: Rasmussen Software, Inc.
>>>> 10240 SW Nimbus, Suite L9
>>>> Portland, OR 97223 USA
>>>> _______________________________________________
>>>> Filepro-list mailing list
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>>>
>>>
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>>
>> Regards,
>> ....Bob Rasmussen, President, Rasmussen Software, Inc.
>>
>> personal e-mail: ras at anzio.com
>> company e-mail: rsi at anzio.com
>> voice: (US) 503-624-0360 (9:00-6:00 Pacific Time)
>> fax: (US) 503-624-0760
>> web: http://www.anzio.com
>> street address: Rasmussen Software, Inc.
>> 10240 SW Nimbus, Suite L9
>> Portland, OR 97223 USA
>> _______________________________________________
>> Filepro-list mailing list
>> Filepro-list at lists.celestial.com
>> Subscribe/Unsubscribe/Subscription Changes
>> http://mailman.celestial.com/mailman/listinfo/filepro-list
>>
>
> --
> Audio panton, cogito singularis.
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Regards,
....Bob Rasmussen, President, Rasmussen Software, Inc.
personal e-mail: ras at anzio.com
company e-mail: rsi at anzio.com
voice: (US) 503-624-0360 (9:00-6:00 Pacific Time)
fax: (US) 503-624-0760
web: http://www.anzio.com
street address: Rasmussen Software, Inc.
10240 SW Nimbus, Suite L9
Portland, OR 97223 USA
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