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CCS
2010
ACM
15 years 10 months ago
Scene tagging: image-based CAPTCHA using image composition and object relationships
In this paper, we propose a new form of image-based CAPTCHA we term "scene tagging". It tests the ability to recognize a relationship between multiple objects in an imag...
Peter Matthews, Cliff Changchun Zou
CCS
2008
ACM
15 years 9 months ago
Avoiding timing channels in fixed-priority schedulers
A practically feasible modification to fixed-priority schedulers allows to avoid timing channels despite threads having access to precise clocks. This modification is rather simpl...
Marcus Völp, Claude-Joachim Hamann, Hermann H...
CCS
2008
ACM
15 years 9 months ago
Assessing query privileges via safe and efficient permission composition
We propose an approach for the selective enforcement of access control restrictions in, possibly distributed, large data collections based on two basic concepts: i) flexible autho...
Sabrina De Capitani di Vimercati, Sara Foresti, Su...
JNW
2006
149views more  JNW 2006»
15 years 7 months ago
Authenticated AODV Routing Protocol Using One-Time Signature and Transitive Signature Schemes
Mobile ad hoc network (MANET) has been generally regarded as an ideal network model for group communications because of its specialty of instant establishment. However, the securit...
Shidi Xu, Yi Mu, Willy Susilo
EUROCRYPT
2009
Springer
16 years 7 months ago
Smashing SQUASH-0
At the RFID Security Workshop 2007, Adi Shamir presented a new challenge-response protocol well suited for RFIDs, although based on the Rabin public-key cryptosystem. This protocol...
Khaled Ouafi, Serge Vaudenay