45 citations
6 papers
Security problems with a chaos-based deniable authentication scheme
G. Alvarez
Recently, a new scheme was proposed for deniable authentication. Its main originality lied on applying a chaos-based encryption-hash parallel algorithm and the semi-group property…
The Collinder 69 cluster in the context of the Lambda Orionis SFR
David Barrado y Navascues, J. R. Stauffer, J. Bouvier +1
The Lambda Orionis Star Forming Region is a complex structure which includes the Col 69 (Lambda Orionis) cluster and the B30 & B35 dark clouds. We have collected deep optical photo…
Lambda Orionis: A 0.02-50 Msun Initial Mass Function
David Barrado y Navascues, J. R. Stauffer, J. Bouvier
The Lambda Orionis Star Forming Region is dominated by the O8 III star lambda^1 Ori. Among other structures, it includes a CO and a dust ring whose diameter is about nine deg, the…
Cryptanalyzing an improved security modulated chaotic encryption scheme using ciphertext absolute value
G. Alvarez, F. Montoya, M. Romera +1
This paper describes the security weakness of a recently proposed improved chaotic encryption method based on the modulation of a signal generated by a chaotic system with an appro…
Fourier-Mukai and Nahm transforms for holomorphic triples on elliptic curves
Oscar García-Prada, Daniel Hernández Ruipérez, Fabio Pioli +1
We define a Fourier-Mukai transform for a triple consisting of two holomorphic vector bundles over an elliptic curve and a homomorphism between them. We prove that in some cases th…
Classification of Material G-structures
David Marin, Manuel de Leon
A geometrical interpretation of the -structures associated to elastic material bodies is given. In addition, characterizations of their integrability are obtained. Since the lac…