Title :
Multiple point Android digital image authentication
Author :
Achimescu, Emanuel ; Preda, Radu Ovidiu ; Vizireanu, Nicolae ; Pirnog, Ionut
Author_Institution :
Telecommun. Dept., Univ. Politeh. of Bucharest, Bucharest, Romania
Abstract :
Digital images have been accepted as evidence in courts of law for a long time. One mandatory aspect for the admission of photographic evidence is the need for authentication. A spontaneous scene is very likely to be photographed with a smartphone rather than a classical camera. Android powered devices count for around 80% of smartphones worldwide. There is a high probability that an image used as evidence has been captured with this type of device. Android uses JPEG format for storing captured images. JPEG header´s embedded information exhibits a wide variation across different models and manufacturers. By taking advantage of this variation, the authentication method described in this article employs a multiple point verification of both intrinsic and extrinsic properties of the analyzed image. The extrinsic properties are being obtained from a 185 entries database of Android powered devices. Authentication is performed straight-forward, allowing the authenticity decision to be made at different points in the process, without the need of a full analysis to be employed beforehand.
Keywords :
Android (operating system); authorisation; image capture; smart phones; visual databases; Android powered devices; JPEG format; JPEG header embedded information; authenticity decision; extrinsic properties; image capture; intrinsic properties; multiple point verification; multiple-point android digital image authentication; photographic evidence; smart phone; spontaneous scene; Authentication; Cameras; Databases; Global Positioning System; Image segmentation; Metadata; Transform coding;
Conference_Titel :
Signals, Circuits and Systems (ISSCS), 2015 International Symposium on
Conference_Location :
Iasi
Print_ISBN :
978-1-4673-7487-3
DOI :
10.1109/ISSCS.2015.7203945