Application of Modern Methods of Cryptoanalysis in Designing the High-Speed Block Ciphers

2005 ◽  
Vol 63 (6) ◽  
pp. 487-497
Author(s):  
L. K. Babenko ◽  
Ye. A. Mishustina
Keyword(s):  
High Speed ◽  
Block Ciphers ◽  
Modern Methods

scholarly journals Efficient and high speed key-independent AES-based authenticated encryption architecture using FPGAs

2017 ◽  
Vol 7 (1.5) ◽  
pp. 230
Author(s):  
A. Murali ◽  
K Hari Kishore
Keyword(s):  
High Speed ◽  
Hash Functions ◽  
Data Integrity ◽  
Block Ciphers ◽  
Authenticated Encryption ◽  
Time Data ◽  
Cryptographic Primitives ◽  
Security Services ◽  
High Security ◽  
Security Levels

Data manipulations are made with the use of communication and networking systems. But at the same time, data integrity is also a needed and important property that must be maintained in every data communicating systems. For this, the security levels are provided with cryptographic primitives like hash functions and block ciphers which are deployed into the systems. For efficient architectures, FPGA-based systems like AES-GCM and AEGIS-128 plays in the best part of the re-configurability, which supports the security services of such communication and networking systems. We possibly focus on the performance of the systems with the high security of the FPGA bit streams. GF (2128) multiplier is implemented for authentication tasks for high-speed targets. And also, the implementations were evaluated by using vertex 4.5 FPGA’s

RE-ANALYSIS OF WILLIAM FROUDE’S STUDIES OF PLANING CRAFT

2015 ◽  
Vol 157 (B1) ◽  
Author(s):  
M G Morabito
Keyword(s):  
Flat Plate ◽  
High Speed ◽  
Internal Combustion Engines ◽  
Frictional Resistance ◽  
Combustion Engines ◽  
Flat Plates ◽  
Planing Craft ◽  
Modern Methods ◽  
Resistance Prediction ◽  
Minimum Resistance

One of William Froude’s lesser-known contributions to the field of Naval Architecture was in conducting some of the earliest studies on planing craft. Froude’s research was prompted by the idea of an inventor, Reverend C.M. Ramus who in 1872 proposed a high-speed ship concept using a flat-bottomed, stepped planing hull. Ramus later suggested the use of this hullform for rocket-propelled rams. Froude conducted towing tests on a model of the Ramus hull, as well as on a model three-point hydroplane concept of his own design. He also derived a solution for the optimum trim angle and minimum resistance of planing craft, using his recently developed formulae for estimating frictional resistance on flat plates and lift forces on submerged plates. Froude’s study demonstrated that Ramus’s ideas were not feasible at the time and the study received very little attention. It was not until the advent of lightweight internal combustion engines, thirty years later, that planing hulls became a reality. In the current paper, the Ramus tests are re-analysed and the data are put into a modern format. Comparisons are provided between the Ramus hull, Series 62 and a planing flat plate. The Ramus concept is shown to have had significantly more drag than would be expected from a planing hull. New model tests explore the effects of the rounded stern of the Ramus hull, and show that this feature significantly increases the resistance. Froude’s derivation of the minimum resistance of planing craft is discussed and contrasted with modern methods for prismatic planing hull resistance prediction.

Paper 6: Process Lubrication for the Production of Rolled Strip in Copper and its Alloys

1965 ◽  
Vol 180 (11) ◽  
pp. 205-212
Author(s):  
H. Exley
Keyword(s):  
Free Surface ◽  
Hot Rolling ◽  
High Speed ◽  
Rolled Strip ◽  
Hydraulic Systems ◽  
Paper Briefly ◽  
Finish Rolling ◽  
Oil In Water ◽  
Modern Methods ◽  
Cluster Type

Some form of lubrication is required at each stage in the rolling of strip in copper and its alloys. In the finishing operations the problem is complicated by the need to produce a clean, stain-free surface, which imposes severe limitations on the types of lubricants and additives that can be used. This paper briefly reviews the reasons for lubrication during rolling and then discusses the qualities required in the lubricants, how near the precise requirements can be achieved in practice, and the limitations which currently available lubricants place on the processes. Hot rolling and cold breaking down give little trouble, but intermediate and finish rolling are more critical; the types of both oil-in-water emulsions and neat oils needed are dealt with in some detail for slow-and highspeed mills. The problem of contamination of the rolling lubricant by the oils and greases used as mill lubricants and in mill hydraulic systems is considered and suggestions are presented for minimizing the trouble by the use of special lubricants and modern methods of lubrication, including the latest practices on cluster-type Sendzimir mills. The design of roll coolant systems for modern high-speed four-high strip mills and cluster-type Sendzimir mills is discussed, in so far as it affects the lubricant and strip finish. The paper concludes with a brief review of the problems posed by the latest development of the pendulum mill and their possible solutions.

scholarly journals Efficient Parallel Implementation of CTR Mode of ARX-Based Block Ciphers on ARMv8 Microcontrollers

2021 ◽  
Vol 11 (6) ◽  
pp. 2548
Author(s):  
JinGyo Song ◽  
Seog Chung Seo
Keyword(s):  
High Speed ◽  
Parallel Implementation ◽  
Optimization Technique ◽  
Block Ciphers ◽  
Processing Technique ◽  
Industrial Applications ◽  
Mobile Telecommunication ◽  
Cryptographic Algorithms ◽  
Improved Performance ◽  
Iot Devices

With the advancement of 5G mobile telecommunication, various IoT (Internet of Things) devices communicate massive amounts of data by being connected to wireless networks. Since this wireless communication is vulnerable to hackers via data leakage during communication, the transmitted data should be encrypted through block ciphers to protect the data during communication. In addition, in order to encrypt the massive amounts of data securely, it is essential to apply one of secure mode of operation. Among them, CTR (CounTeR) mode is the most widely used in industrial applications. However, these IoT devices have limited resources of computing and memory compared to typical computers, so that it is challenging to process cryptographic algorithms that have computation-intensive tasks in IoT devices at high speed. Thus, it is required that cryptographic algorithms are optimized in IoT devices. In other words, optimizing cryptographic operations on these IoT devices is not only basic but also an essential effort in order to build secure IoT-based service systems. For efficient encryption on IoT devices, even though several ARX (Add-Rotate-XOR)-based ciphers have been proposed, it still necessary to improve the performance of encryption for smooth and secure IoT services. In this article, we propose the first parallel implementations of CTR mode of ARX-based ciphers: LEA (Lightweight Encryption Algorithm), HIGHT (high security and light weight), and revised CHAM on the ARMv8 platform, a popular microcontroller in various IoT applications. For the parallel implementation, we propose an efficient data parallelism technique and register scheduling, which maximizes the usage of vector registers. Through proposed techniques, we process the maximum amount of encryption simultaneously by utilizing all vector registers. Namely, in the case of HIGHT and revised CHAM-64/128 (resp. LEA, revised CHAM-128/128, and CHAM-128/256), we can execute 48 (resp. 24) encryptions simultaneously. In addition, we optimize the process of CTR mode by pre-computing and using the intermediate value of some initial rounds by utilizing the property that the nonce part of CTR mode input is fixed during encryptions. Through the pre-computation table, CTR mode is optimized up until round 4 in LEA, round 5 in HIGHT, and round 7 in revised CHAM. With the proposed parallel processing technique, our software provides 3.09%, 5.26%, and 9.52% of improved performance in LEA, HIGHT, and revised CHAM-64/128, respectively, compared to the existing parallel works in ARM-based MCU. Furthermore, with the proposed CTR mode optimization technique, our software provides the most improved performance with 8.76%, 8.62%, and 15.87% in LEA-CTR, HIGHT-CTR, and revised CHAM-CTR, respectively. This work is the fastest implementation of CTR mode on ARMv8 architecture to the best of our knowledge.

scholarly journals Features of systems greasing of diesel engines MANB&W

2020 ◽  
Vol 1 ◽  
pp. 144-151
Author(s):  
V.M. Bogach ◽  
◽  
J.M. Dovidenko ◽  
I.M. Slobodianiuk ◽  
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
High Speed ◽  
Piston Ring ◽  
Actual Problem ◽  
Modern Methods ◽  
Cylinder Piston ◽  
Overall Performance ◽  
Experimental Researches ◽  
To Receive

The abstract The publication is devoted the decision of an actual problem increase efficiency operation of ship diesel engines by perfection processes greasing of cylinders. The analysis a condition of a question on an investigated problem is made and lacks systems greasing of diesel engines MAN-B&W are defined. Experimental researches on studying processes greasing of cylinders of ship engines that has allowed to receive representation about an overall performance these systems are spent. Modern methods researches, such as oscillograms and high-speed filming are thus used. Characteristics process greasing, and their interrelation with a design of greasing devices are defined. Influence geometrical parametres of channels system greasing on characteristics process the expiration of oil in the cylinder and finally on efficiency its use in the engine is experimentally confirmed. Keywords: ship diesel engine, greasing system, greasing channel, greasing process, cylinder, piston, a piston ring.

scholarly journals Theoretical Justification of Coating Adhesion during Gas-Thermal Spraying

2022 ◽  
Author(s):  
Y.A. Kuznetsov
Keyword(s):  
High Speed ◽  
Thermal Spraying ◽  
Flame Spraying ◽  
Theoretical Justification ◽  
Coating Adhesion ◽  
Theoretical Substantiation ◽  
Modern Methods ◽  
Machine Parts

Abstract.The article provides a brief overview of modern methods of thermal spraying. Particular attention is paid to high-speed flame spraying. The theoretical substantiation of the adhesion of coatings formed on machine parts using the methods of thermal spraying is presented.

scholarly journals Opportunities to improve the efficiency of design and construction

2019 ◽  
Vol 97 ◽  
pp. 01008 ◽  
Author(s):  
Angelina Rybakova ◽  
Pavel Kagan
Keyword(s):  
High Speed ◽  
Mechanisms Of Action ◽  
Detailed Consideration ◽  
Advantages And Disadvantages ◽  
Detailed Method ◽  
Modern Methods ◽  
Technology Services ◽  
The Impact ◽  
Construction Works ◽  
Design And Construction

This article discusses the current opportunities of «high-speed construction», which are based on technological, organizational and managerial approaches. For each acceleration approach under study, the mechanisms of action, advantages and disadvantages, as well as its distribution and scope, are identified. The most detailed method of «high-speed construction» based on the combination of design and construction works. The formation of this approach and the tools for its implementation are considered in detail. In this regard, the aim of the work is a detailed consideration of all modern methods of «high – speed construction», and the task-their structuring and interconnection. In the course of the study, the method of analyzing the directions of improving the efficiency of design and construction was applied. As a result, algorithms and tools for accelerating construction are formulated, as well as the impact of BIM-technology services.

scholarly journals MODERN METHODS OF GEAR MILLING OF HARDENED LARGE-MODULE GEARS

10.23856/4340 ◽  
2021 ◽  
Vol 43 (6) ◽  
pp. 312-323
Author(s):  
Kateryna Kamchatna-Stepanova ◽  
Oleksandr Klochko
Keyword(s):  
High Speed ◽  
Technical Problem ◽  
High Hardness ◽  
Labor Costs ◽  
Gear Grinding ◽  
Modern Methods ◽  
Low Performance ◽  
Grinding Operations ◽  
Technological Methods

The latest developments of modern methods of high-speed gear milling of large-module cylindrical gears, both for preliminary grinding of teeth and for final blade processing of gears, are considered. For high-speed blade gear processing, promising designs of worm carbide cutters have been developed, manufactured and implemented. The technological regulations of blade gear processing for the operation of each of the design solutions of worm carbide cutters have been developed. The design of a special double-body worm cutter for double-sided cutting has been developed. It is shown that the carbide cutting elements of the milling cutters, which are placed only along the lines of the machine engagement of the tool and the workpiece, make it more economical compared to the known designs of similar tools. The application of the developed technological methods of pre-blade processing of the teeth of hardened wheels with carbide cutters reduces the labor intensity of low-performance gear grinding operations, depending on the wheel module, by 3-4 times by reducing the allowance from 1.5–2.5 mm on the tooth side to 0.3–0.5 mm, and also allows you to ensure the gear processing process is economical by reducing the consumption of carbide plates. The developed technological studies of ensuring the quality of gear processing of large-module cylindrical wheels allow us to solve the scientific and technical problem associated with the production of large-module gears with high-hardness teeth while improving the quality of their manufacture, reducing labor costs and reducing material consumption.

scholarly journals HARDWARE-SOFTWARE COMPLEX FOR DIGITAL PROCESSING OF HYDROACOUSTIC SIGNALS

2019 ◽  
pp. 60-63
Author(s):  
S. A. Koltakov ◽  
A. A. Cherepnev
Keyword(s):  
Signal Processing ◽  
High Speed ◽  
Digital Signal ◽  
Digital Processing ◽  
General Purpose ◽  
Software Complex ◽  
General Purpose Processor ◽  
Input And Output ◽  
Programming Tools ◽  
Modern Methods

The  article  describes  the  hardware‑software  complex  (HSC)  based  on  the  debugging  stand,  its  composition,  modules  and  operations. A method for synthesizing the output signal is described, a formula and a table of parameters for its calculation are  given. Signals and spectra at the input and output of the developed HSC are shown. The obtained parameters of the performance  of various agribusiness, based on the signal processor with a General‑purpose processor and two variants with General‑purpose  processors.  The  proposed  version  of  the  HSC2–3  times  wins  in  performance  compared  to  the  HSC  based  on  the  general‑ purpose processor of Intel. This is achieved through the use of modern methods and programming tools, digital signal processing  modules, as well as the optimization of the executable code. Recommendations for possible further improvement of the proposed  complex are given, which is possible due to the use of modern FPGAs and high‑speed interface.

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