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CMS
2003
13 years 5 months ago
2003
Abstract. Wavelet packet decompositions generalize the classical pyramidal wavelet structure. We use the vast amount of possible wavelet packet decomposition structures to create a...
CMS
2003
13 years 5 months ago
2003
Classic security systems use a trust model centered in the authentication procedure, which depends on a naming service. Even when using a Public Key Infrastructure as X.509, such s...
ISCAS
2003
IEEE
13 years 9 months ago
2003
IEEE
We propose a new channel compensation method for modulation spectral features. We compare our proposed method, subband normalization, with a more traditional method, cepstral mean...
CMS
2003
13 years 5 months ago
2003
We outline cryptographic key–computation from biometric data based on error-tolerant transformation of continuous-valued face eigenprojections to zero-error bitstrings suitable f...
CMS
2003
13 years 5 months ago
2003
Abstract. Some security problems can be often solved through authorization rather than authentication. Furthermore, certificate-based authorization approach can alleviate usual dr...