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arXiv 2019年

作者： Bezyazeekov, Pavel Bychkov, Igor Budnev, Nikolay Chernykh, Daria Kazarina, Yulia Kostunin, Dmitriy Kryukov, Alexander Monkhoev, Roman Shigarov, Alexey Shipilov, Dmitriy Applied Physics Institute Irkutsk State University Irkutsk Russia Matrosov Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Irkutsk Russia DESY Zeuthen Germany Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics Moscow Russia

The open science framework defined in the German-Russian Astroparticle Data Life Cycle Initiative (GRADLCI) has triggered educational and outreach activities at the Irkutsk State University (ISU), which is actively participated in the two major astroparticle facilities in the region: TAIGA observatory and Baikal-GVD neutrino telescope. We describe the ideas grew out of this unique environment and propose a new open science laboratory based on education and outreach as well as on the development and testing new methods and techniques for the multimessenger astronomy. Copyright © 2019, The Authors. All rights reserved.

关键词： Observatories

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Using the Beth-Uhlenbeck approach to describe the kaon to pion ratio in a 2+1 flavor PNJL model

arXiv

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arXiv 2019年

作者： Blaschke, D. Friesen, A. Kalinovsky, Yu. Radzhabov, A. Institute for Theoretical Physics University of Wroclaw Wroclaw50-204 Poland Joint Institute for Nuclear Research Dubna Dubna141980 Russia Moscow115409 Russia Matrosov Institute for System Dynamics and Control Theory Irkutsk664033 Russia Irkutsk State University Irkutsk664003 Russia

The kaon to pion ratios are discussed in the framework of a 2+1 flavor PNJL model. In order to interpret the behaviour of bound states in medium the Beth-Uhlenbeck approach is used. It is shown that in terms of phase shifts in the K+ channel an additional low-energy mode could appear as a bound state in medium since the masses of the quark constituents are different. The comparison with experimental data for the ratios is performed and the influence of the anomalous mode to the "horn" effect in the K+/π+ ratio is discussed. Copyright © 2019, The Authors. All rights reserved.

关键词： Hadrons

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A distributed data warehouse system for astroparticle physics 8

A distributed data warehouse system for astroparticle physic...

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Selected Papers of the 8th International Conference "Distributed Computing and Grid-Technologies in Science and Education", GRID 2018

作者： Nguyen, Minh-Duc Kryukov, Alexander Dubenskaya, Julia Korosteleva, Elena Polyakov, Stanislav Postnikov, Evgeny Bychkov, Igor Mikhailov, Andrey Shigarov, Alexey Fedorov, Oleg Kazarina, Yulia Shipilov, Dmitry Zhurov, Dmitry Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics Moscow Russia Matrosov Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Irkutsk Russia Applied Physics Institute Irkutsk State University Irkutsk Russia

A distributed data warehouse system is one of the actual issues in the field of astroparticle physics. Famous experiments, such as TAIGA, KASCADE-Grande, produce tens of terabytes of data measured by their instruments. It is critical to have a smart data warehouse system on-site to store the collected data for further distribution effectively. It is also vital to provide scientists with a handy and user-friendly interface to access the collected data with proper permissions not only on-site but also online. The latter case is handy when scientists need to combine data from different experiments for analysis. In this work, we describe an approach to implementing a distributed data warehouse system that allows scientists to acquire just the necessary data from different experiments via the Internet on demand. The implementation is based on CemVM-FS with additional components developed by us to search through the whole available data sets and deliver their subsets to users' computers. © 2018 Minh-Duc Nguyen, Alexander Kryukov, Julia Dubenskaya, Elena Korosteleva, Stanislav Polyakov, Evgeny Postnikov, Igor Bychkov, Andrey Mikhailov, Alexey Shigarov, Oleg Fedorov, Yulia Kazarina, Dmitry Shipilov, Dmitry Zhurov.

关键词： Data warehouses

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Application of HUBzero platform for the educational process in astroparticle physics 8

Application of HUBzero platform for the educational process ...

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Selected Papers of the 8th International Conference "Distributed Computing and Grid-Technologies in Science and Education", GRID 2018

作者： Kazarina, Yulia Bychkov, Igor Kryukov, Alexander Dubenskaya, Julia Korosteleva, Elena Nguyen, Minh-Duc Polyakov, Stanislav Postnikov, Evgeny Mikhailov, Andrey Shigarov, Alexey Fedorov, Oleg Shipilov, Dmitry Zhurov, Dmitry Applied Physics Institute Irkutsk State University Irkutsk Russia Matrosov Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Irkutsk Russia Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics Moscow Russia

In the frame of the Karlsruhe-Russian Astroparticle Data Life Cycle Initiative it was proposed to deploy an educational resource *** for the training of students in the field of astroparticle physics. This resource is based on HUBzero, which is an open-source software platform for building powerful websites, which supports scientific discovery, learning, and collaboration. HUBzero has been deployed on the servers of matrosov institute for system dynamics and control theory. The educational resource *** is being filled with the information covering cosmic messengers, astroparticle physics experiments and educational courses and schools on astroparticle physics. Furthermore, the educational resource *** can be used for online collaboration. We present the current status of this project and our first experience of application of this service as a collaboration framework. © 2018 Yulia Kazarina, Igor Bychkov, Alexander Kryukov, Julia Dubenskaya, Elena Korosteleva, Dmitriy Kostunin, Minh-Duc Nguyen, Stanislav Polyakov, Evgeny Postnikov, Andrey Mikhailov, Alexey Shigarov, Oleg Fedorov, Dmitry Shipilov, Dmitry Zhurov.

关键词： Open source software

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Implementation of a brute force attack on the A5/1 keystream generator in a GPU-based volunteer computing project 3

Implementation of a brute force attack on the A5/1 keystream...

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3rd International Conference BOINC-Based High Performance Computing: Fundamental Research and Development, BOINC:FAST 2017

作者： Bulavintsev, Vadim Semenov, Alexander Zaikin, Oleg Matrosov Institute for System Dynamics and Control Theory SB RAS Irkutsk Russia

We present an advanced brute force attack on the A5/1 keystream generator, that is still widely used in modern GSM networks. To greatly reduce the search space, we use a well-known idea, introduced by R. Anderson more than 20 years ago. The main contribution of the present paper is the implementation of Anderson's attack on a GPU platform in bit-slice technique. The preliminary estimates of the attack's speed showed that, with the use of GPUs processing power, the attack could be performed in the real time on a modern computer cluster or in a volunteer computing project. To verify our estimates with the use of the BOINC technology we launched a volunteer computing project and executed our variant of Anderson's attack within it. As a result, 10 A5/1 cryptanalysis problems were solved in 7 days in the project. The results presented in this work provide yet another proof of A5/1's cryptographic weakness that shows that this generator is totally unsuitable for transmission of any kind of sensitive data through modern GSM networks. Copyright © by the paper's authors. Copying permitted for private and academic purposes.

关键词： Graphics processing unit

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An Improved SAT-Based Guess-and-Determine Attack on the Alternating Step Generator 20th

An Improved SAT-Based Guess-and-Determine Attack on the Alte...

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20th International Conference on Information Security, ISC 2017

作者： Zaikin, Oleg Kochemazov, Stepan Matrosov Institute for System Dynamics and Control Theory SB RAS Irkutsk Russia

ISBN: (纸本)9783319696584

In this paper, we propose an algorithm for constructing guess-and-determine attacks on keystream generators and apply it to the cryptanalysis of the alternating step generator (ASG) and two its modifications (MASG and MASG0). In a guess-and-determine attack, we first "guess" some part of an initial state and then apply some procedure to determine, if the guess was correct and we can use the guessed information to solve the problem, thus performing an exhaustive search over all possible assignments of bits forming a chosen part of an initial state. We propose to use in the "determine" part the algorithms for solving Boolean satisfiability problem (SAT). It allows us to consider sets of bits with nontrivial structure. For each such set it is possible to estimate the runtime of a corresponding guess-and-determine attack via the Monte-Carlo method, so we can search for a set of bits yielding the best attack via a black-box optimization algorithm augmented with several SAT-specific features. We constructed and implemented such attacks on ASG, MASG, and MASG0 to prove that the constructed runtime estimations are reliable. We show, that the constructed attacks are better than the trivial ones, which imply exhaustive search over all possible states of the control register, and present the results of experiments on cryptanalysis of ASG and MASG/MASG0 with total registers length of 72 and 96, which have not been previously published in the literature. © 2017, Springer International Publishing AG.

关键词： Monte Carlo methods

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Geoportal cloud

Geoportal cloud

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2017 All-Russian Conference "Spatial Data Processing for Monitoring of Natural and Anthropogenic Processes, SDM 2017

作者： Fedorov, Roman K. Shumilov, Alexander S. Ruzhnikov, Gennady M. Matrosov Institute for System Dynamics and Control Theory of Siberian Branch Irkutsk Russia

Within the article, a technology is proposed for creating a geoportal for the collection and exchange of data between subject specialists. The technology is based on the developed model geoportal that implements common functions for many information systems. The technology significantly accelerates the creation of a subject-oriented geoportal that implements a ready-made set of various functions.

关键词： Geoportal Services Spatial data WMS WPS

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The study of inversion problems of cryptographic hash functions from md family using algorithms for solving boolean satisfiability problem

The study of inversion problems of cryptographic hash functi...

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2016 International Conference Mathematical and Information Technologies, MIT 2016

作者： Gribanova, Irina Zaikin, Oleg Kochemazov, Stepan Otpuschennikov, Ilya Semenov, Alexander Matrosov Institute for System Dynamics and Control Theory SB RAS Irkutsk Russia

In this paper we present the results of application of state-ofthe-Art SAT solvers to inversion of cryptographic hash functions from the MD family. In particular we consider the problems of finding preimages and collisions for MD4 and MD5. To solve them we use the approach based on reducing the original problems to Boolean satisfiability problem (SAT). The propositional encoding of the algorithms specifying the considered functions was performed using the Transalg software system. The features of this system make it possible to effectively augment the SAT encodings for MD4 and MD5 hash functions with various additional constraints that improve the effectiveness of SAT solvers on corresponding instances. The effectiveness of the proposed algorithms is better than that in a number of preceding papers. We used the developed algorithms to find new families of two-block collisions for MD5 and to construct new differential paths for finding single-block collisions for MD4.

关键词： Hash functions

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Lepton phenomenology of Stueckelberg portal to dark sector

arXiv

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arXiv 2021年

作者： Kachanovich, Aliaksei Kovalenko, Sergey Kuleshov, Serguei Lyubovitskij, Valery E. Zhevlakov, Alexey S. Wolfgang-Gaede-Straße 1 Karlsruhe76131 Germany Ruder Boskovic Institute Bijenicka cesta 54 Zagreb10000 Croatia Departamento de Ciencias Físicas Universidad Andres Bello Sazié 2212 Piso 7 Santiago Chile of ANID Fernández Concha 700 Santiago Chile Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Bogoliubov Laboratory of Theoretical Physics JINR Dubna141980 Russia Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia

We propose an extension of the Standard Model (SM) with a UA′(1) gauge invariant dark dector connected to the SM via a new portal — the Stueckelberg portal, arising in the framework of dark photon A′ mass generation via Stueckelberg mechanism. This portal opens through the effective dim=5 operators constructed from the covariant term of the auxiliary Stueckelberg scalar field σ providing flavor non-diagonal renormalizable couplings of both σ and A′ to the SM fermions ψ. The Stueckelberg scalar plays a role of Goldstone boson in the generation of mass of the Dark Photon. Contrary to the conventional kinetic mixing portal, in our scenario flavor diagonal A′ψ couplings are not proportional to the fermion charges and are, in general, flavor nondiagonal. These features drastically change the phenomenology of dark photon A′ relaxing or avoiding some previously established experimental constraints. We focus on the phenomenology of the described scenario of the Stueckelberg portal in the lepton sector and analyze the contribution of the dark sector fields A′ to the anomalous magnetic moment of muon (g−2)µ, lepton flavor violating decays li → lkγ and µ−e conversion in nuclei. We obtain limits on the model parameters from the existing data on the corresponding observables. © 2021, CC BY.

关键词： Fermions

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Identification of the energy system critical elements using the PARMONC library

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Journal of Physics: Conference Series 2021年第1期1715卷

作者： A V Edelev M A Marchenko O Yu Basharina Melentiev Energy Systems Institute SB RAS Lermontov St. 130 Irkutsk Russia 664033 Institute of Computational Mathematics and Mathematical Geophysics SB RAS 6 Ac. Lavrentieva ave. Novosibirsk Russia 630090 Novosibirsk State University Novosibirsk-90 2 Russia 630090 Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov St. 134 Irkutsk Russia 664033

In this paper, we presented a Monte Carlo-based approach for vulnerability analyse of energy systems. For high-performance Monte Carlo simulation the PARMONC software library was used. The PARMONC is implemented on high-performance clusters of the Siberian Supercomputer Center. The PARMONC effectively launches parallel stochastic simulation on supercomputers with different architectures. The proposed approach was applied was applied for the identification and ranking the most important elements of a real-world natural gas supply system.

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