Images taken with smartphones usually contain extra information included, known as Metadata. This information can be as basic as the time and date of the image, and as accurate as the location where the image was taken, the type of camera, environmental data, and stop counting.
Certainly, that information may be harmless, but in some scenarios, excess information in a single image or video can put a simple photo taker in danger.
In this situation, The Guardian Project, development Obscuracam, camera-type app that eliminates the information (metadata) generated in each file, in addition to automatically detecting and blurring the faces in each photo and video, maintaining the anonymity of the user.
Now, from another point of view, the generation of these metadata can be useful information for content validation, especially in these times where the known “Citizen journalism”Every time it takes more flight. All of this makes metadata important now, considering that digital image manipulation and alteration is common these days.
Once again, The Guardian Project appears, but now with CameraV, an application of open source guidance on Android, based on the platform InformaCam. With which you can take photos and videos, with content validation through the use of metadata.
It was developed by activists, journalists and lawyers, whose goal was to create an application that allows them to capture visual evidence and prove abuse and violation of rights worldwide.
CameraV is a metadata capturer, it uses the sensors that your smartphone has to obtain environmental information, as well as data from WiFi, bluetooth, and cellular networks, to store them along with the photographs taken. In this way, CameraV gets not only the image of what is happening, but also Capture the atmosphere of the photo or video. These sensors can be from:
Movement, such as accelerometers, which allow detecting the movement that occurred at the time of recording.
Position, through GPS location, providing exact coordinates where the image or video was taken.
Environmentsuch as thermometers that provide temperature information and weather-related data.
Also, CameraV stores WIFI networks and Bluetooth devices in the vicinity of the place, including location data within the mobile network, to provide a higher level of information for content verification.
This considerable amount of metadata is encrypted under PGP and shared with other people to help verify the information that is being provided, through a unique file ID, or digital signature together with the rest of the metadata, which will be sent to an email address, SMS or social network.
The ability of an app to verify the authenticity of each image is important to anyone. Although we agree that this additional information may compromise the user in some way, this same information can provide valuable evidence capable of making known what is happening at a time and place.