3 research outputs found
Secured Cryptographic Key Generation From Multimodal Biometrics Feature Level Fusion Of Fingerprint And Iris
Human users have a tough time remembering long cryptographic keys. Hence,
researchers, for so long, have been examining ways to utilize biometric
features of the user instead of a memorable password or passphrase, in an
effort to generate strong and repeatable cryptographic keys. Our objective is
to incorporate the volatility of the users biometric features into the
generated key, so as to make the key unguessable to an attacker lacking
significant knowledge of the users biometrics. We go one step further trying to
incorporate multiple biometric modalities into cryptographic key generation so
as to provide better security. In this article, we propose an efficient
approach based on multimodal biometrics (Iris and fingerprint) for generation
of secure cryptographic key. The proposed approach is composed of three modules
namely, 1) Feature extraction, 2) Multimodal biometric template generation and
3) Cryptographic key generation. Initially, the features, minutiae points and
texture properties are extracted from the fingerprint and iris images
respectively. Subsequently, the extracted features are fused together at the
feature level to construct the multibiometric template. Finally, a 256bit
secure cryptographic key is generated from the multibiometric template. For
experimentation, we have employed the fingerprint images obtained from publicly
available sources and the iris images from CASIA Iris Database. The
experimental results demonstrate the effectiveness of the proposed approach.Comment: Pages IEEE format, International Journal of Computer Science and
Information Security, IJCSIS January 2010, ISSN 1947 5500,
http://sites.google.com/site/ijcsis
Sparsely Grouped Input Variables for Neural Networks
In genomic analysis, biomarker discovery, image recognition, and other
systems involving machine learning, input variables can often be organized into
different groups by their source or semantic category. Eliminating some groups
of variables can expedite the process of data acquisition and avoid
over-fitting. Researchers have used the group lasso to ensure group sparsity in
linear models and have extended it to create compact neural networks in
meta-learning. Different from previous studies, we use multi-layer non-linear
neural networks to find sparse groups for input variables. We propose a new
loss function to regularize parameters for grouped input variables, design a
new optimization algorithm for this loss function, and test these methods in
three real-world settings. We achieve group sparsity for three datasets,
maintaining satisfying results while excluding one nucleotide position from an
RNA splicing experiment, excluding 89.9% of stimuli from an eye-tracking
experiment, and excluding 60% of image rows from an experiment on the MNIST
dataset
Multimodal Biometrics Fusion Using Correlation Filter Bank
In this paper, a novel class-dependence feature analysis method based on Correlation Filter Bank (CFB) technique for effective multimodal biometrics fusion at the feature level is developed. In CFB, the unconstrained correlation filter trained for a specific modality is designed by optimizing the overall original correlation outputs. Therefore, the differences between modalities have been taken into account and useful information in various modalities is fully exploited. Preliminary experimental results on the fusion of face and palmprint biometrics show the superiority of the novel method. 1