LOCSUE 2011 Abstracts


Short Papers
Paper Nr: 5
Title:

CERTIFICATION WATERMARKING FOR DIGITAL HANDHELD-CAPTURED PHOTOGRAPHY

Authors:

Yves Stadler and Yann Lanuel

Abstract: In digital world, photography lost its legal value due to the massive usage and the ease of modifications. This paper presents a watermarking technique which adds a proof of validity to a smartphone-captured photography. By analysing the context of provability issues (attacks, impacts and objectives), the authors derives requirements. The constraints of the domain leads to the specification of a semi-fragile algorithm, which embeds pieces of information like geolocation or timestamp to insure the provability. An evaluation of the process shows the cryptographic robustness of the algorithm.

Posters
Paper Nr: 2
Title:

A DYNAMIC JOIN-LEAVE MULTI-PURPOSE SCHEME FOR RFID INFRASTRUCTURE

Authors:

Iuon-Chang Lin

Abstract: Previously, a multi-purpose RFID tag needs one purpose stored one key in the tag and server, otherwise there will be security issues. In this paper, we propose a scheme for multi-purpose RFID tags. In this scheme, user can dynamic join-and-leave the purposes in multiple applications. Moreover, just authorized tags can be accessed. Our scheme is capable of applying multi-purpose tags, and we just need to store one key in a tag. Our approach will not cause the large computations of the database.