Tatouage d'image semi-fragile pour appareil mobile intégré dans une chaîne de certification

Abstract : Smartphones are nowadays ubiquitous, they can be found in anybody's hands with no consideration of one's age or work. They are used to create, manipulate and broadcast security constrained pieces of information (in term of confidentiality, integrity or authenticity). Different protection types can be found, with regard to the security constraints (copyrights, document tracking, etc.). This thesis presents a watermarking scheme tailored for smartphone-captured images, which scheme allows the use of the image as an evidence. The goal is linking the evidence to the image and forbidding any content modification. Confidentiality not being a constraint, the scheme keeps the image visible and allow its broadcast. Contextual pieces of data are part of the evidence: author name, date of shot and geographic location (geolocation). Few means are available to assess this geolocation. The second part of the thesis aims to fill this gap by proposing software based countermeasures to enhanced geolocation authenticity. Finally, the last chapter presents a critic of security works on the other authentication methods required to forge a strong proof
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Yves Stadler. Tatouage d'image semi-fragile pour appareil mobile intégré dans une chaîne de certification. Autre [cs.OH]. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0395⟩. ⟨tel-01749961⟩



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