Guidance Notes on Validation Certificates

Description of the validation data

Validation Certificates relate to evidence that was captured by the Self Evident app and validated by our secure server. Evidence imported from outside the Self Evident app will not be included, as it cannot be validated by this service.

The report

User:  This is the user name of the person who made the report
User’s email: This is the email address they sent it from
Date Certificate Downloaded: The date that the validation certificate was downloaded from www.JustEvidence.org
Subject: This is the subject the user gave for the Report
Description: This is the brief summary the user added in free text
Incident Date Selected:  This is the date & time the user selected for the event
Location Selected: This is the location the user selected for the event.  (To show this latitude and longitude on a map, visit http://www.latlong.net/Show-Latitude-Longitude.html)
Items of Evidence: This is the number of items of evidence the user attached
Report Created: This is the date & time by Greenwich Mean Time (GMT) the report was received on the server. (To convert GMT to local time, visit http://www.gmt.to)
Report sent to:  This is the email address they sent it to.  If the report was not sent but only secured, it will show as 'Unsent'.
Date report sent: This is the date when the report was sent to the recipient
           

Validation data for items from Self Evident

1 Type
The item is Video, Audio, Photo, Video Statement, Crime Statement, Supplement, or Commentary
2 Unique reference   
This is the unique File name of the item
3 Date & time on phone when item created
This is the date & time (GMT) logged by the phone when the item was created
4 Date & time on server when it registers item created
This the date & time recorded by the server by GMT when the app notifies it the item was created.
5 Date & time on server when item received   
This is the date and time recorded by the server at GMT when the item is received on the server.
6 Location Log on app when item created
This is the location recorded by the app’s phone when the item was created.
7 Location Log on app when server registers item created
This is the location recorded by the app when it notifies the server the item has been created
8 Length
This is the length of time of a video or audio when it arrived on the server
9 Dimensions
This is the pixel size of a video or photo when it arrived on the server
10 File size:   
This is the MB size of the item when it arrived on the server.

Authenticity

Certificate

If you downloaded a certificate from https://www.justevidence.org it is authentic.  If you come by a certificate another way and want to check its authenticity, please contact the reporter and ask them to send you a link so you can download a certificate direct from the server.

Time lags

Time lag from the item created (3) and this being registered on the server (4)

A lag between the time shown at number 3 and number 4 will be because the app was throughout that period unable to connect to the internet either by wifi or the phone network. 

The time shown on the server at item 4 is by Greenwich Mean Time.  To adjust this to local time, convert server’s Greenwich Mean Time to local time, please visit http://www.gmt.to

Time lag from when item is registered on the server (4) and received by it (5)

A short lapse between 4 and 5 will reflect the time the user took to complete his or her report. A lengthy lapse will be because the user chose not to report the incident until the later time.

Location

To confirm latitude and longitude co-ordinates on a map, please visit http://www.latlong.net/Show-Latitude-Longitude.html

If the location when the item was created at 6 is shown as N/A (not available), this will be because at that time the app was unable to connect to the internet by wifi or through the phone’s network.  This may have been because location services on the phone were switched off or because there was no internet connectivity at that time and place. 

Where the location information when the item was created is not available, the location information at 7 shows where the reporter was once internet connection was regained.  This information can validate the evidence and the reason that the app recorded no location information at the time the item was created.

EXIF Data

We are evaluating the use of stripping the EXIF data from media files taken with the app. This pilot is only running at this time on the iPhone app and it means that when an item of evidence taken with an iPhone is downloaded to a computer, its File Properties will (a) not show it was taken with an iPhone, and (b) will show the creation date of the item as the time and date of the download.

Evidence

Validation Certificates relate to evidence that was downloaded from https://www.justevidence.org. If you came by the evidence another way and want to check its authenticity, please contact the reporter and ask them to send you a link so you can view and save an authentic copy of their report and download the items of evidence attached to it.

Further corroboration

By corroborating information from the app with that on the independent server, a Validation Certificate can provide assurance you that the evidence is reliable and has not been tampered with. 

If, however, you have real doubts about the reliability of any item of evidence, further corroboration can be obtained by the mobile phone operator supplying GPS data on the location and connectivity of the phone at and around the time the item was created. 


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