scholarly journals PAGE—Practical AES-GCM Encryption for Low-End Microcontrollers

2020 ◽  
Vol 10 (9) ◽  
pp. 3131 ◽  
Author(s):  
Kyungho Kim ◽  
Seungju Choi ◽  
Hyeokdong Kwon ◽  
Hyunjun Kim ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Main Idea ◽  
Optimization Methods ◽  
Optimization Techniques ◽  
Middle Term ◽  
Risc Processor ◽  
Look Up Table ◽  
Mode Of Operation ◽  
Security Levels ◽  
The Look

An optimized AES (Advanced Encryption Standard) implementation of Galois Counter Mode of operation (GCM) on low-end microcontrollers is presented in this paper. Two optimization methods are applied to proposed implementations. First, the AES counter (CTR) mode of operation is speed-optimized and ensures constant timing. The main idea is replacing expensive AES operations, including AddRound Key, SubBytes, ShiftRows, and MixColumns, into simple look-up table access. Unlike previous works, the look-up table does not require look-up table updates during the entire encryption life-cycle. Second, the core operation of Galois Counter Mode (GCM) is optimized further by using Karatsuba algorithm, compact register utilization, and pre-computed operands. With above optimization techniques, proposed AES-GCM on 8-bit AVR (Alf and Vegard’s RISC processor) architecture from short-term, middle-term to long-term security levels achieved 415, 466, and 477 clock cycles per byte, respectively.

scholarly journals ACE: ARIA-CTR Encryption for Low-End Embedded Processors

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3788 ◽  
Author(s):  
Hwajeong Seo ◽  
Hyeokdong Kwon ◽  
Hyunji Kim ◽  
Jaehoon Park
Keyword(s):  
Diffusion Layer ◽  
High Speed ◽  
Block Cipher ◽  
Embedded Processors ◽  
Embedded Processor ◽  
Modes Of Operation ◽  
Risc Processor ◽  
Mode Of Operation ◽  
Security Levels

In this paper, we present the first optimized implementation of ARIA block cipher on low-end 8-bit Alf and Vegard’s RISC processor (AVR) microcontrollers. To achieve high-speed implementation, primitive operations, including rotation operation, a substitute layer, and a diffusion layer, are carefully optimized for the target low-end embedded processor. The proposed ARIA implementation supports the electronic codebook (ECB) and the counter (CTR) modes of operation. In particular, the CTR mode of operation is further optimized with the pre-computed table of two add-round-key, one substitute layer, and one diffusion layer operations. Finally, the proposed ARIA-CTR implementations on 8-bit AVR microcontrollers achieved 187.1, 216.8, and 246.6 clock cycles per byte for 128-bit, 192-bit, and 256-bit security levels, respectively. Compared with previous reference implementations, the execution timing is improved by 69.8%, 69.6%, and 69.5% for 128-bit, 192-bit, and 256-bit security levels, respectively.

From Freezing to Investing: New Approaches to Monetary and Currency Policies

2008 ◽  
pp. 47-55
Author(s):  
A. Nekipelov ◽  
Yu. Goland
Keyword(s):  
Economic Policy ◽  
Property Rights ◽  
Main Idea ◽  
State Intervention ◽  
Economic Thought ◽  
Human Potential ◽  
Knowledge Based ◽  
Russian Economy ◽  
Knowledge Based Economy

The appeals to minimize state intervention in the Russian economy are counterproductive. However the excessive involvement of the state is fraught with the threat of building nomenclature capitalism. That is the main idea of the series of articles by prominent representatives of Russian economic thought who formulate their position on key elements of the long-term strategy of Russia’s development. The articles deal with such important issues as Russia’s economic policy, transition to knowledge-based economy, basic directions of monetary and structural policies, strengthening of property rights, development of human potential, foreign economic priorities of our state.

Musikalisasi Syi’ir Aqoid Kiai Zaini Mun’im dan Budidaya Tanaman Obat Keluarga (Toga) di Pesantren Nurul Jadid Probolinggo

2020 ◽  
Vol 1 (1) ◽  
pp. 47-58
Author(s):  
Khodijatul Qodriyah
Keyword(s):  
Herbal Medicine ◽  
Herbal Medicines ◽  
Successful Implementation ◽  
Short Term ◽  
Middle Term

The lack of students’ knowledge of their teachers’ works and the less of their consciousness to the environment are crucial problems in some islamic boardingschool, especially in Nurul Jadid. These issues will be settled by implementation of religious preaching (dakwah) with poem (syi’ir) in Syu’abul Iman of Kiai Zaini Mun’im and prefentive action to the illness through herbal medicines of family crops medicine (tanaman obat keluarga). The program is undertaken with some phases, including planting family crops medicine, making herbal medicines, musicalisation of poem in book of Syu’abul Iman, socialization of the herbal medicine and musical poem of Syu’abul Iman. These phases have been structured with long-term, middle-term, and short-term programs which were finished during approximately 4 months (Augustus – November 2019). The involvement of many parties, such as activists of environment in Nurul Jadid, has strongly influenced on the successful implementation of these programs.Keywords: Family Crops Medicine, Nurul Jadid Islamic Boardingschool, Book of Syu’abul Iman

Assessment of the look-up table using the tubular and bundle CHF data and modification of the bundle correction factor

Kerntechnik ◽  
2006 ◽  
Vol 71 (4) ◽  
pp. 192-202
Author(s):  
D. K. Chandraker ◽  
P. K. Vijayan ◽  
D. Saha ◽  
R. K. Sinha
Keyword(s):  
Correction Factor ◽  
Look Up Table ◽  
The Look

scholarly journals Development of Multilayer-Based Map Matching to Enhance Performance in Large Truck Fleet Dispatching

2021 ◽  
Vol 10 (2) ◽  
pp. 79
Author(s):  
Ching-Yun Mu ◽  
Tien-Yin Chou ◽  
Thanh Van Hoang ◽  
Pin Kung ◽  
Yao-Min Fang ◽  
...  
Keyword(s):  
Data Structures ◽  
Spatial Data ◽  
Spatial Information ◽  
Data Retrieval ◽  
Spatial Data Mining ◽  
Map Matching ◽  
Matching Algorithm ◽  
Table Method ◽  
Look Up Table ◽  
The Look

Spatial information technology has been widely used for vehicles in general and for fleet management. Many studies have focused on improving vehicle positioning accuracy, although few studies have focused on efficiency improvements for managing large truck fleets in the context of the current complex network of roads. Therefore, this paper proposes a multilayer-based map matching algorithm with different spatial data structures to deal rapidly with large amounts of coordinate data. Using the dimension reduction technique, the geodesic coordinates can be transformed into plane coordinates. This study provides multiple layer grouping combinations to deal with complex road networks. We integrated these techniques and employed a puncture method to process the geometric computation with spatial data-mining approaches. We constructed a spatial division index and combined this with the puncture method, which improves the efficiency of the system and can enhance data retrieval efficiency for large truck fleet dispatching. This paper also used a multilayer-based map matching algorithm with raster data structures. Comparing the results revealed that the look-up table method offers the best outcome. The proposed multilayer-based map matching algorithm using the look-up table method is suited to obtaining competitive performance in identifying efficiency improvements for large truck fleet dispatching.

scholarly journals Countryís Competitiveness and Sustainability in the Context of the Higher Education System Reforms

2013 ◽  
Vol 15 (1) ◽  
pp. 73-83 ◽  
Author(s):  
Elita Jermolajeva ◽  
Ludmila Aleksejeva
Keyword(s):  
Higher Education ◽  
Economic Development ◽  
Education Reform ◽  
Education System ◽  
Global Economy ◽  
Middle Term ◽  
Higher Education System ◽  
National Economic ◽  
Quantitative Indicators

Abstract The accumulation of knowledge and its use have become important factors that promote economic development as they contribute to a countryís competitiveness in the global economy. The basic significance of research is obtained by defining new approaches in the organisation, function and efficiency of the higher education system (HES) by emphasising its qualitative aspects. The aim of the article is to describe the influence of education reform on economic competitiveness, paying a special attention to analysing and evaluating international experiences from an interdisciplinary perspective, including economics, pedagogy, etc. Quantitative indicators are used to characterise specific features of the HES and the interaction of this system in the overall context of state development. Some aspects of the Latvian HES are also analysed. The economic activity of inhabitants often directly depends on their level of education. In order to reorganise the Latvian HES and increase its competitiveness and efficiency, thus ensuring quality and availability, the Latvian education system must define a middle-term (4ñ5 years) and long-term (10ñ15 years) development plan that is coordinated with national economic development.

scholarly journals Calibration of a Nonlinear DC Motor under Uncertainty Using Nonlinear Optimization Techniques

2021 ◽  
Vol 65 (1) ◽  
pp. 42-52
Author(s):  
Hamed Keshmiri Neghab ◽  
Hamid Keshmiri Neghab
Keyword(s):  
Nonlinear Optimization ◽  
Model Calibration ◽  
Optimization Methods ◽  
Dc Motor ◽  
Optimization Techniques ◽  
Unknown Parameters ◽  
Labview Software ◽  
Dc Motors ◽  
Industrial Software ◽  
Nonlinear Optimization Methods

The use of DC motors is increasingly high and it has more parameters which should be normalized. Now the calibration of each parameters is important for each motor, because it affects in its performance and accuracy. A lot of researches are investigated in this area. In this paper demonstrated how to estimate the parameters of a Nonlinear DC Motor using different Nonlinear Optimization techniques of fitting parameters to model, that called model calibration. First, three methods for calibration of a DC motor are defined, then unknown parameters of the mathematical model with the nonlinear optimization techniques for the fitting routines and model calibration process, are identified. In addition, three optimization techniques such as Levenberg-Marquardt, Constrained Nonlinear Optimization and Gauss-Newton, are compared. The goal of this paper is to estimate nonlinear parameters of a DC motor under uncertainty with nonlinear optimization methods by using LabVIEW software as an industrial software and compare the nonlinear optimization methods based on position, velocity and current. Finally, results are illustrated and comparison between these methods based on the results are made.

scholarly journals PERENCANAAN DAN PENGENDALIAN KAPASITAS PRODUKSI PRODUK RAKITAN RADIO TIPE SOUNESS SNI 4250

2018 ◽  
Vol 20 (1) ◽  
pp. 40-47
Author(s):  
Abdul Rahim Matondang ◽  
Widodo Widodo
Keyword(s):  
Production Process ◽  
Production Planning ◽  
Capacity Planning ◽  
Pure Strategy ◽  
Raw Material ◽  
Optimization Approach ◽  
Production Schedule ◽  
Middle Term ◽  
Individual Product

Production system take an important role in industries, especially in manufacturing industries. This role determine the keys of successful company. Production process is an activity which produce finished product from raw material that involve machine, energy, and technique knowledge. Production process is real activity and can be seen by human being. The problems those always be faced in indutries management’s are the arrangement of production schedule, such lack of inventory or overstock once the settlement of production process isn’t on time. Production planning and control is activity to determine what product that will be produced, how many product that will be produced and how many labors needed in production processes. By using production planning and control’s method, those problems can be minimalized. Aggregate planning is one of production planning a.nd control’s method. By using this method, production planning could be done by using unit of replacement product so that the output of this planning isn’t declared in individual product. So, the output of aggregate planning isn’t planning in form of individual product but aggregate’s product. There are some strategies on aggregate planning such as pure strategy on aggregate planning and mixed strategy on aggregate planning. In this research, method of aggregate planning that used is optimization approach by linier rule. This method used to make long term planning and middle term planning. Long term planning consists of product forecasting and aggregate planning. The middle term planning consist of master production schedule and rough cut capacity planning. The result of this research is capacity needed and capacity available to determine which work center is drum and which isn’t. Conclusion of this research that capacity of each work center in perioad january to december 2018 is non drum. This indicate the good scheduling in capacity planning.

Sign in / Sign up

Export Citation Format

Share Document