43,106 research outputs found
"The Good, The Bad And The Ugly": Evaluation of Wi-Fi Steganography
In this paper we propose a new method for the evaluation of network
steganography algorithms based on the new concept of "the moving observer". We
considered three levels of undetectability named: "good", "bad", and "ugly". To
illustrate this method we chose Wi-Fi steganography as a solid family of
information hiding protocols. We present the state of the art in this area
covering well-known hiding techniques for 802.11 networks. "The moving
observer" approach could help not only in the evaluation of steganographic
algorithms, but also might be a starting point for a new detection system of
network steganography. The concept of a new detection system, called MoveSteg,
is explained in detail.Comment: 6 pages, 6 figures, to appear in Proc. of: ICNIT 2015 - 6th
International Conference on Networking and Information Technology, Tokyo,
Japan, November 5-6, 201
An O(M(n) log n) algorithm for the Jacobi symbol
The best known algorithm to compute the Jacobi symbol of two n-bit integers
runs in time O(M(n) log n), using Sch\"onhage's fast continued fraction
algorithm combined with an identity due to Gauss. We give a different O(M(n)
log n) algorithm based on the binary recursive gcd algorithm of Stehl\'e and
Zimmermann. Our implementation - which to our knowledge is the first to run in
time O(M(n) log n) - is faster than GMP's quadratic implementation for inputs
larger than about 10000 decimal digits.Comment: Submitted to ANTS IX (Nancy, July 2010
Tests of Seiberg-like Duality in Three Dimensions
We use localization techniques to study several duality proposals for
supersymmetric gauge theories in three dimensions reminiscent of Seiberg
duality. We compare the partition functions of dual theories deformed by real
mass terms and FI parameters. We find that Seiberg-like duality for N=3
Chern-Simons gauge theories proposed by Giveon and Kutasov holds on the level
of partition functions and is closely related to level-rank duality in pure
Chern-Simons theory. We also clarify the relationship between the
Giveon-Kutasov duality and a duality in theories of fractional M2 branes and
propose a generalization of the latter. Our analysis also confirms previously
known results concerning decoupled free sectors in N=4 gauge theories realized
by monopole operators.Comment: 36 pages, 5 figure
The glocalised telenovela as a space for possible identifications for diaspora girls in Northern Belgium: an audience cum content analysis of Sara
Because research on glocalised telenovelas in Western Europe is absent in literature and telenovelas seem highly popular among diaspora girls from Moroccan descents living in Northern Belgium, this paper studies the embedded themes and identification possibilities of telenovelas and explores its thematic interest and meanings for diaspora girls. By means of an audience cum content analysis on the case study Sara, text and audience are combined. Sara is predominantly a ‘Cinderella story’ with a clear ‘love’ and ‘class and social mobility’ discourse where emotional identification is triggered through different parameters. Belgian girls from Moroccan descent mainly watch the Sara for reasons of entertainment and escapism. They negotiate between lived and telenovela-created experiences and consequently formulate aspirations and dreams for future partners, gender roles, careers and (family) life
Fingerprint Analysis with Marked Point Processes
We present a framework for fingerprint matching based on marked point process
models. An efficient Monte Carlo algorithm is developed to calculate the
marginal likelihood ratio for the hypothesis that two observed prints originate
from the same finger against the hypothesis that they originate from different
fingers. Our model achieves good performance on an NIST-FBI fingerprint
database of 258 matched fingerprint pairs
Answering Subcognitive Turing Test Questions: A Reply to French
Robert French has argued that a disembodied computer is incapable of
passing a Turing Test that includes subcognitive questions. Subcognitive
questions are designed to probe the network of cultural and perceptual
associations that humans naturally develop as we live, embodied and
embedded in the world. In this paper, I show how it is possible for a
disembodied computer to answer subcognitive questions appropriately,
contrary to FrenchÂ’s claim. My approach to answering subcognitive
questions is to use statistical information extracted from a very large
collection of text. In particular, I show how it is possible to answer a
sample of subcognitive questions taken from French, by issuing queries to
a search engine that indexes about 350 million Web pages. This simple
algorithm may shed light on the nature of human (sub-) cognition, but the
scope of this paper is limited to demonstrating that French is mistaken: a
disembodied computer can answer subcognitive questions
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