MV3: A new word based stream cipher using rapid mixing and revolving buffers

MV3 is a new word based stream cipher for encrypting long streams of data. A direct adaptation of a byte based cipher such as RC4 into a 32- or 64-bit word version will obviously need vast amounts of memory. This scaling issue necessitates a look for new components and principles, as well as mathematical analysis to justify their use. Our approach, like RC4's, is based on rapidly mixing random walks on directed graphs (that is, walks which reach a random state quickly, from any starting point). We begin with some well understood walks, and then introduce nonlinearity in their steps in order to improve security and show long term statistical correlations are negligible. To minimize the short term correlations, as well as to deter attacks using equations involving successive outputs, we provide a method for sequencing the outputs derived from the walk using three revolving buffers. The cipher is fast -- it runs at a speed of less than 5 cycles per byte on a Pentium IV processor. A word based cipher needs to output more bits per step, which exposes more correlations for attacks. Moreover we seek simplicity of construction and transparent analysis. To meet these requirements, we use a larger state and claim security corresponding to only a fraction of it. Our design is for an adequately secure word-based cipher; our very preliminary estimate puts the security close to exhaustive search for keys of size < 256 bits.Comment: 27 pages, shortened version will appear in "Topics in Cryptology - CT-RSA 2007

ЛАБОРАТОРНИЙ СТЕНД КЕРУВАННЯ МАНІПУЛЯТОРОМ М10П ВІД SCADA СИСТЕМИ TRACE MODE

To improve the quality of the educational process for students majoring in Electromechanical systems of automation and electric drive at Zaporizhzhya National Technical University test machine computer control of manipulator M10P SCADA TRACE MODE system via OPC-server , USB port on your computer and controllers of VIPA was developed. It is possible to increase professional knowledge and skills to work with modern equipment of leading companies. Actuality of modernization, technical description of the stand are given. Stand consists of: mechanical manipulator parts, electrical and pneumatic drives, controllers, position sensor , control panels and computer. The block diagram of the stand, the software features of SCADA system TRACE MODE are shown, the user interface is designed as well as methods of laboratory work are given. The more detailed information as to the arm automatic mode control (setting to zero position. Cycle work ) is presented. The possibility for data encoder to track the movements of the hand pointing in panel desktop user interface is shown.Для повышения качества учебного процесса студентов специальности электромеханические системы автоматизации и электропривод в Запорожском национальном техническом университете разработан лабораторный стенд компьютерного управления манипулятором М10П от SCADA системы TRACE MODE через OPC-сервер, USB порт компьютера и контроллер фирмы VIPA. Это позволило повысить профессиональные знания и навыков работы на современном оборудовании ведущих фирм. Приведена структурная схема стенда, программное обеспечение, интерфейс пользователя в SCADA системе и методика проведения лабораторных работ.Для підвищення якості навчального процесу студентів спеціальності електромеханічні системи автоматизації та електропривод у Запорізькому національному технічному університеті розроблено лабораторний стенд комп’ютерного керування маніпулятором М10П від SCADA системи TRACE MODE через ОРС-сервер і USB порт комп’ютера та контролер фірми VIPA. Це дозволило підвищити професійні знання і навички роботи на сучасному обладнанні провідних фірм. Наведено структурну схему стенда, програмне забезпечення, інтерфейс користувача у SCADA системі та методику проведення лабораторних робіт

Crystal Undulator As A Novel Compact Source Of Radiation

A crystalline undulator (CU) with periodically deformed crystallographic planes is capable of deflecting charged particles with the same strength as an equivalent magnetic field of 1000 T and could provide quite a short period L in the sub-millimeter range. We present an idea for creation of a CU and report its first realization. One face of a silicon crystal was given periodic micro-scratches (grooves), with a period of 1 mm, by means of a diamond blade. The X-ray tests of the crystal deformation have shown that a sinusoidal-like shape of crystalline planes goes through the bulk of the crystal. This opens up the possibility for experiments with high-energy particles channeled in CU, a novel compact source of radiation. The first experiment on photon emission in CU has been started at LNF with 800 MeV positrons aiming to produce 50 keV undulator photons.Comment: Presented at PAC 2003 (Portland, May 12-16

Efficiency criteria for surgical treatment of compression-ischemic ulnar neuropathies

The aim of the investigation was to improve the treatment results of patients by reducing unreasonably long terms of conservative management.Цель исследования - улучшить результаты лечения пациентов за счет сокращения неоправданно длительных сроков консервативного ведения пациенто

IoT Expunge: Implementing Verifiable Retention of IoT Data

The growing deployment of Internet of Things (IoT) systems aims to ease the daily life of end-users by providing several value-added services. However, IoT systems may capture and store sensitive, personal data about individuals in the cloud, thereby jeopardizing user-privacy. Emerging legislation, such as California's CalOPPA and GDPR in Europe, support strong privacy laws to protect an individual's data in the cloud. One such law relates to strict enforcement of data retention policies. This paper proposes a framework, entitled IoT Expunge that allows sensor data providers to store the data in cloud platforms that will ensure enforcement of retention policies. Additionally, the cloud provider produces verifiable proofs of its adherence to the retention policies. Experimental results on a real-world smart building testbed show that IoT Expunge imposes minimal overheads to the user to verify the data against data retention policies.Comment: This paper has been accepted in 10th ACM Conference on Data and Application Security and Privacy (CODASPY), 202

Clinical features and results of surgical treatment of brain metastasis

Due to the increase in the frequency of metastatic brain lesions among other types of cancer, the urgency of a more thorough study of this problem is also increasing. This article describes the main sources of brain metastases, features of their metastasis, clinical manifestations and MRI images, as well as postoperative and long-term results of surgical treatment of patients with this pathology.В связи с увеличением частоты метастатических поражений головного мозга среди иных видов онкологических заболеваний, повышается и актуальность более тщательного изучение данной проблемы. В данной статье описаны основные источники метастазов в головной мозг, особенности их распространения, клинических проявлений и МРТ-картины, а также послеоперационные и отдаленные результаты хирургического лечения пациентов с данной патологией

FAVOR (FAst Variability Optical Registration) -- A Two-telescope Complex for Detection and Investigation of Short Optical Transients

An astronomical complex intended to detect optical transients (OTs) in a wide field and follow them up with high time resolution investigation is described.Comment: 4 pages, 3 figures. To be published in "Il Nuovo Cimento", Proceedings of the 4th Rome Workshop on Gamma-Ray Bursts in the Afterglow Era, eds. L. Piro, L. Amati, S. Covino, B. Gendr

One-dimensional Model of a Gamma Klystron

A new scheme for amplification of coherent gamma rays is proposed. The key elements are crystalline undulators - single crystals with periodically bent crystallographic planes exposed to a high energy beam of charged particles undergoing channeling inside the crystals. The scheme consists of two such crystals separated by a vacuum gap. The beam passes the crystals successively. The particles perform undulator motion inside the crystals following the periodic shape of the crystallographic planes. Gamma rays passing the crystals parallel to the beam get amplified due to interaction with the particles inside the crystals. The term `gamma klystron' is proposed for the scheme because its operational principles are similar to those of the optical klystron. A more simple one-crystal scheme is considered as well for the sake of comparison. It is shown that the gamma ray amplification in the klystron scheme can be reached at considerably lower particle densities than in the one-crystal scheme, provided that the gap between the crystals is sufficiently large.Comment: RevTeX4, 22 pages, 4 figure

TEMPERATURE BEHAVIOR OF THE ABSORPTION EDGE IN BI-IMPLANTED HONGAN SILICA GLASS

The effect of thermal and structural disorder on the electronic structure of glass silicon dioxide (Hongan Silica Glass) irradiated with 30 KeV bismuth ions Φ = 1× 1017 cm-2 is in-vestigated by the McPherson VuVAS 1000PL VUV spectrometer in the 120-500 nm wave-length range