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A New Path to Code-based Signatures via Identification Schemes with Restricted Errors [article]

Marco Baldi, Massimo Battaglioni, Franco Chiaraluce, Anna-Lena Horlemann-Trautmann, Edoardo Persichetti, Paolo Santini, Violetta Weger
2021 arXiv   pre-print
Thus, these schemes offer an improved basis for the construction of code-based digital signature schemes derived from identification schemes through the well-know Fiat-Shamir transformation.  ...  We study the properties of random codes under this new decoding perspective, in the fashion of traditional coding theory results, and assess the complexity of solving a random R-SDP instance.  ...  However, the situation is not the same for signature schemes, and the vast majority of attempts to build a code-based signature scheme that is at the same time secure and efficient were unsuccessful.  ... 
arXiv:2008.06403v3 fatcat:cbrrlayonfdjnltu6cav6slb74

Wave: A New Family of Trapdoor One-Way Preimage Sampleable Functions Based on Codes [article]

Thomas Debris-Alazard and Nicolas Sendrier and Jean-Pierre Tillich
2019 arXiv   pre-print
We present here a new family of trapdoor one-way Preimage Sampleable Functions (PSF) based on codes, the Wave-PSF family.  ...  We instantiate the new Wave-PSF family with ternary generalized (U,U+V)-codes to design a "hash-and-sign" signature scheme which achieves existential unforgeability under adaptive chosen message attacks  ...  Introduction Code-Based Signature Schemes.  ... 
arXiv:1810.07554v2 fatcat:7cxwckxrergffcwcccx22odc7q

GRAVITATIONAL WAVE SIGNATURES OF MAGNETOHYDRODYNAMICALLY DRIVEN CORE-COLLAPSE SUPERNOVA EXPLOSIONS

Tomoya Takiwaki, Kei Kotake
2011 Astrophysical Journal  
By performing a series of two-dimensional, special relativistic magnetohydrodynamic (MHD) simulations, we study signatures of gravitational waves (GWs) in the magnetohydrodynamically-driven core-collapse  ...  As for the microphysics, a realistic equation of state is employed and the neutrino cooling is taken into account via a multiflavor neutrino leakage scheme.  ...  By performing a series of two-dimensional, special relativistic MHD simulations, we study signatures of gravitational waves in the MHD mechanism.  ... 
doi:10.1088/0004-637x/743/1/30 fatcat:q7kwp5lq4rclfgzradmbpadg2m

Short-wave and long-wave radiative properties of Saharan dust aerosol

S. R. Osborne, A. J. Baran, B. T. Johnson, J. M. Haywood, E. Hesse, S. Newman
2011 Quarterly Journal of the Royal Meteorological Society  
Measured nadir brightness temperatures from high level show signature of dust. A drop in brightness temperature of 14K was determined using modelled pristine-sky spectra.  ...  A long-wave interferometer measured downwelling and upwelling radiances to derive surface emissivity across the window region.  ...  Below we describe two new short-wave radiometers that were operated in GERBILS.  ... 
doi:10.1002/qj.771 fatcat:e4asn636bzdqjjfj5wcbyc3qxu

DNA waves and water

L Montagnier, J Aissa, E Del Giudice, C Lavallee, A Tedeschi, G Vitiello
2011 Journal of Physics, Conference Series  
A scheme able to account for the observations is proposed. The reported phenomenon could allow to develop highly sensitive detection systems for chronic bacterial and viral infections.  ...  Some bacterial and viral DNA sequences have been found to induce low frequency electromagnetic waves in high aqueous dilutions.  ...  The wave length of 7 Hz photons is slightly larger than the circumference of Earth. Could it be that a temporal pattern associated with a single period of 7 Hz oscillation could code for DNA codons.  ... 
doi:10.1088/1742-6596/306/1/012007 fatcat:26z747bhlng5lcpkpxa7fjk2hq

Wave Equations [chapter]

Svein Linge, Hans Petter Langtangen
2017 Finite Difference Computing with PDEs  
A very wide range of physical processes lead to wave motion, where signals are propagated through a medium in space and time, normally with little or no permanent movement of the medium itself.  ...  Many types of wave motion can be described by the equation u t t D r .c 2 ru/ C f , which we will solve in the forthcoming text by finite difference methods. 93  ...  One application where the index set notation is convenient is conversion of code from a language where arrays has base index 0 (e.g., Python and C) to languages where the base index is 1 (e.g., MATLAB  ... 
doi:10.1007/978-3-319-55456-3_2 fatcat:766f5h5prbhxxev56frdtbkvnu

Asymmetric behavior of surface waves induced by an underlying interfacial wave [article]

Shixiao W. Jiang and Gregor Kovačič and Douglas Zhou
2019 arXiv   pre-print
We develop a weakly nonlinear model to study the spatiotemporal manifestation and the dynamical behavior of surface waves in the presence of an underlying interfacial solitary wave in a two-layer fluid  ...  Our model is relatively easily tractable both theoretically and numerically, thus facilitating the understanding of the surface signature of the observed internal waves.  ...  Different from previous works, we here develop a new reduced model to investigate the spatiotemporal manifestation of the small-amplitude SWs in the presence of an interfacial solitary wave in the two-layer  ... 
arXiv:1907.11279v1 fatcat:azcc5qthvzauxawj6lejjh2diy

Should Stroke Caregivers Recognize the J Wave (Osborn Wave)?

J. G. Heckmann, C. J.G. Lang, B. Neundorfer, S. Ropers, W. Moshage
2001 Stroke  
Although code 674.0 was considered, this identified a small proportion of patients in our cohort. The search strategy used was selected because it allowed  ...  Electrocardiography (12-lead) showing prominent J wave in leads I (arrow), II, V2, V3, V4 (arrow), and V5.  ...  Therefore, their observation and hypothesis are not new.  ... 
doi:10.1161/01.str.32.7.1692-a pmid:11441221 fatcat:xi7hecetd5ccbnjiivms4bixt4

Gravitational waves from core collapse supernovae

Konstantin N Yakunin, Pedro Marronetti, Anthony Mezzacappa, Stephen W Bruenn, Ching-Tsai Lee, Merek A Chertkow, W Raphael Hix, John M Blondin, Eric J Lentz, O E Bronson Messer, Shin'ichirou Yoshida
2010 Classical and quantum gravity  
We present the gravitational wave signatures for a suite of axisymmetric core collapse supernova models with progenitors masses between 12 and 25 solar masses.  ...  Thus, we are able to compute complete waveforms (i.e., through explosion) based on non-parameterized, first-principles models.  ...  The results presented here are preliminary: a new set of 2D simulations performed with an enhanced version of our CHIMERA code is currently ongoing [9] .  ... 
doi:10.1088/0264-9381/27/19/194005 fatcat:4y2ryqhzsff73f6rb6wpk2qczq

Wave-to-Access: Protecting Sensitive Mobile Device Services via a Hand Waving Gesture [chapter]

Babins Shrestha, Nitesh Saxena, Justin Harrison
2013 Lecture Notes in Computer Science  
It captures user's intent to access the service via a lightweight hand waving gesture.  ...  We present the design and implementation of a hand waving gesture recognition mechanism using an ambient light sensor, already available on most mobile devices.  ...  Static analysis [10, 38, 36] , also known as signature-based detection, is based on source or binary code inspection to find suspicious patterns (malware) inside the code.  ... 
doi:10.1007/978-3-319-02937-5_11 fatcat:lgsjcb7anfa4beuqyd3synyq64

Ultrasonic Wave Propagation in a Tooth Phantom [chapter]

S. R. Ghorayeb, T. Xue, W. Lord
1998 Review of Progress in Quantitative Nondestructive Evaluation  
Based on the authors' experience with the detection of defee' '. engineering materials using ultrasound and the development of finite element computer code to study the CL. .oding wave propagation, initial  ...  All A-scan signatures at all six locations are collected over a time span of 4 J,lsec.  ... 
doi:10.1007/978-1-4615-5339-7_223 fatcat:427ejn3lhjhsbgzf63pbodiqe4

Gravitational wave signatures from low-mode spiral instabilities in rapidly rotating supernova cores

Takami Kuroda, Tomoya Takiwaki, Kei Kotake
2014 Physical Review D  
We study properties of gravitational waves (GWs) from rotating core-collapse of a 15M_odot star by performing three-dimensional general-relativistic hydrodynamic simulations with an approximate neutrino  ...  Regarding three-flavor neutrino transport, we solve the energy-averaged set of radiation energy and momentum based on the Thorne's momentum formalism.  ...  Gravitational-Wave Signatures Now we are ready to discuss GW signatures in this section.  ... 
doi:10.1103/physrevd.89.044011 fatcat:bxxbpraoobfohgvvgsi44oycpm

Magnetosphere-ionosphere waves

A. J. B. Russell, A. N. Wright
2012 Journal of Geophysical Research  
Wavebreaking is a very efficient mechanism for producing narrow (inertial) scale waves in the coupled system, readily accessing scales of a few hundred meters in just a few minutes.  ...  In contrast, narrow scale (strongly inertial) waves are nearly stationary and oscillate at a specific frequency.  ...  current at the base of the magnetosphere, one of the magnetospheric signatures of the wave.  ... 
doi:10.1029/2011ja016950 fatcat:be4xhvm6kvcbbbffiq5ovqget4

Analysis of transient electromagnetic scattering phenomena using a two-level plane wave time-domain algorithm

B. Shanker, A.A. Ergin, K. Aygun, E. Michielssen
2000 IEEE Transactions on Antennas and Propagation  
(MOT) based solvers.  ...  The proposed two-level plane wave time-domain (PWTD) algorithm permits a numerically rigorous reconstruction of transient near fields from their far-field expansion and augments classical marching-on in-time  ...  Recently, Walker proposed a very interesting scheme for amortizing the costs of MOT schemes based on discounting noninteracting portions of a scatterer [14] .  ... 
doi:10.1109/8.843664 fatcat:pulwpcboezbzzj4x7s2s66cbky

Gravitational Waves from Axisymmetric, Rotating Stellar Core Collapse

Christian D. Ott, Adam Burrows, Eli Livne, Rolf Walder
2004 Astrophysical Journal  
For each of the total number of 72 different simulations we performed, the gravitational wave signature was extracted via the quadrupole formula in the slow-motion, weak-field approximation.  ...  For each model, we calculate gravitational radiation wave forms, characteristic wave strain spectra, energy spectra, final rotational profiles, and total radiated energy.  ...  Using a smooth particle hydrodynamics code with a neutrino diffusion scheme and the Lattimer-Swesty EOS (Lattimer and Swesty 1991), Fryer and Heger (2000) performed 2-D rotating collapse simulations.  ... 
doi:10.1086/379822 fatcat:w7gaog7a5jc5pevs4gth47or3a
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