scholarly journals Performance comparison of RSA and AES to SMS messages compression using Huffman algorithm

2020 ◽  
Vol 8 (3) ◽  
pp. 171-177 ◽  
Author(s):  
Laurentinus Laurentinus ◽  
Harrizki Arie Pradana ◽  
Dwi Yuny Sylfania ◽  
Fransiskus Panca Juniawan
Keyword(s):  
Performance Comparison ◽  
Short Message ◽  
Average Efficiency ◽  
Rsa Algorithm ◽  
Huffman Algorithm ◽  
Better Than

Improved security of short message services (SMS) can be obtained using cryptographic methods, both symmetric and asymmetric, but must remain efficient. This paper aims to study the performance and efficiency of the symmetric crypto of AES-128 and asymmetric crypto of RSA with message compression in securing SMS messages. The ciphertext of RSA and AES were compressed using the Huffman algorithm. The average AES encryption time for each character is faster than RSA, which is 5.8 and 24.7 ms/character for AES and AES+Huffman encryption and 8.7 and 45.8 ms/character for RSA and RSA+Huffman, from messages with 15, 30, 60 and 90 characters. AES decryption time is also faster, which is 27.2 ms/character compared to 47.6 ms/character in RSA. Huffman compression produces an average efficiency of 24.8 % for the RSA algorithm, better than 17.35 % of AES efficiency for plaintext of 1, 16, 45, and 88 characters.

scholarly journals Performance Comparison of Asymmetric Cryptography (Case study- Mail message)

2019 ◽  
Vol 4 (3) ◽  
pp. 105-111
Author(s):  
Zarni Sann ◽  
Thi thi Soe ◽  
Kaythi Wyut Mhone Knin ◽  
Zin May Win
Keyword(s):  
Computation Time ◽  
Performance Comparison ◽  
Sql Server ◽  
Sensitive Data ◽  
Rsa Algorithm ◽  
Mail Server ◽  
C Programming ◽  
Elgamal Encryption ◽  
Server System

Encryption is a well known technology for protecting sensitive data. ElGamal encryption and RSA algorithm is made before storing mails to mail server. ElGamal decryption and RSA decryption is made after retrieving mails from mail server. This system is implemented to secure mail server system for local government’s important mail messages. These algorithms consume a considerable amount of time and resources such as memory, CPU time, and computation time to encrypt and decrypt data. In this paper, the results are comparison of these algorithms in term of encryption time, decryption time, and memory usage over variable file sizes. After processing, it is proven that RSA performs a faster encryption process than ElGamal. However, ElGamal decryption process is faster than RSA. This system is also expressed comparison of storage Size between RSA and ElGamal. Both of these algorithms are cryptographic public-key algorithms but have functions in different ways. This system is using C# programming language and SQL Server to store mail messages.

scholarly journals Performance Comparison of the Optimized Inverted Joined Wing Airplane Concept and Classical Configuration Airplanes

2016 ◽  
Vol 63 (3) ◽  
pp. 455-470 ◽  
Author(s):  
Adam Sieradzki ◽  
Adam Dziubiński ◽  
Cezary Galiński
Keyword(s):  
Performance Prediction ◽  
Performance Comparison ◽  
Cfd Models ◽  
Induced Drag ◽  
Computational Fluid Dynamics Cfd ◽  
Front Wing ◽  
New Research ◽  
Joined Wing ◽  
Real Scale ◽  
Better Than

Abstract The joined wing concept is an unconventional airplane configuration, known since the mid-twenties of the last century. It has several possible advantages, like reduction of the induced drag and weight due to the closed wing concept. The inverted joined wing variant is its rarely considered version, with the front wing being situated above the aft wing. The following paper presents a performance prediction of the recently optimized configuration of this airplane. Flight characteristics obtained numerically were compared with the performance of two classical configuration airplanes of similar category. Their computational fluid dynamics (CFD) models were created basing on available documentation, photographs and some inverse engineering methods. The analysis included simulations performed for a scale of 3-meter wingspan inverted joined wing demonstrator and also for real-scale manned airplanes. Therefore, the results of CFD calculations allowed us to assess the competitiveness of the presented concept, as compared to the most technologically advanced airplanes designed and manufactured to date. At the end of the paper, the areas where the inverted joined wing is better than conventional airplane were predicted and new research possibilities were described.

scholarly journals A Genetic Method using Hybrid Crossover for Solving Travelling Salesman Problem

2019 ◽  
Vol 8 (2) ◽  
pp. 5066-5072
Keyword(s):  
Hybrid Method ◽  
Nearest Neighbor ◽  
Travelling Salesman Problem ◽  
Performance Comparison ◽  
Initial Population ◽  
Genetic Approach ◽  
Comparison Standard ◽  
Travelling Salesman ◽  
Genetic Method ◽  
Better Than

This paper proposes a Genetic approach using Hybrid Crossover for Solving the Travelling Salesman Problem. Proposed hybrid method generates an initial population using Nearest Neighbor (NN) approach which is modified using “Sub-Path Mutation” (SPM) process. Modified population undergoes Distance Preserving Crossover (DPX) [2] and 2-opt Optimal mutation (2-opt) [1] to check for possible refinement. SPM searches position for the minimum distant city within a given path. This work is motivated by the algorithm developed by [3] who performed DPX and 2-opt mutation on the initial population generated using NN. For performance comparison, standard TSPLIB data is taken. The proposed hybrid method performances better in terms of % best error. It performs better than methods reported in [3 - 11].

scholarly journals ANALISIS KOMPARASI USAHATANI PADI SAWAH PENGGUNA BENIH BERSERTIFIKAT DAN BENIH NON SERTIFIKAT DI KELURAHAN KEMUMU KECAMATAN ARMA JAYA

2015 ◽  
Vol 3 (2) ◽  
pp. 177-188
Author(s):  
Reza Raditya ◽  
Putri Suci Asriani ◽  
. Sriyoto
Keyword(s):  
Sampling Method ◽  
Certified Seed ◽  
Total Sample ◽  
Land Productivity ◽  
Average Income ◽  
Average Efficiency ◽  
Average Productivity ◽  
Qualitative Descriptive ◽  
The Village ◽  
Better Than

This research purposse are to calculate and compare the productivity of land, income, and efficiency between paddy farming using certified seed and paddy farming which uses non-certified seed. The research was conductedin the village of Kemumu with a total sample of 15 farmers certified seed specified users using census method and 22 non-certified seed user farmers were determined using purposive sampling method. Methods of data analysis using quantitative analysis and qualitative (descriptive). The analysis showed that the average productivity of the land (5,112 Ton/Ha), average income (Rp 16.501.384,77/Ha), and the average efficiency (3,91) forpaddy farming using certified seed. While the average productivity of the land (3,918 Ton/Ha), the average income (Rp 10.951.035,29/Ha), and the average efficiency (3.24) for paddy farming which uses non-certified seed. Based onthe results ofthe analysis, itcan be concluded that certified seed is better than non-certified seed both in terms of land productivity, income, and efficiency. Key words: certified and non certified seeds, productivity of land, income, efficiency 

Dynamic Characteristic Analysis of Mega-Sub Controlled Structure with Friction Pendulum Bearings

2014 ◽  
Vol 926-930 ◽  
pp. 550-556
Author(s):  
Chang Xia ◽  
Da Bao Fu ◽  
Bin Huang ◽  
Li Ying Liu
Keyword(s):  
Friction Coefficient ◽  
Dynamic Characteristic ◽  
Performance Comparison ◽  
Control Effect ◽  
Characteristic Analysis ◽  
Structural Dynamic ◽  
Coefficient Increase ◽  
Controlled Structure ◽  
Friction Pendulum ◽  
Better Than

A novelty configuration of tall building structure, so-called mega-sub controlled structure (MSCS) with friction pendulum bearings (FPBs), which is featured by the FPBs at the bottom of sub-structures, is studied. The seismic responses of the MSCS with FPBs are carried out. The effects of the radius of the sliding surface and friction coefficient on structural dynamic characteristic indices, i.e. energy, acceleration, story displacement, story shear force, are analyzed. A performance comparison is made with the conventional MSCS. The results show that the MSCS with FPBs exhibits a better vibration-control effect than conventional MSCS. The controlling effectiveness of structure with radius of 500mm and 1500mm is better than that with radius of 1000mm and 2000mm. As the friction coefficient increase, the dynamic behaviors of structure tend to increase.

scholarly journals Performance Comparison of GeneXpert MTB/RIF and ProbeTec ET Tests for Rapid Molecular Diagnosis of Extrapulmonary Tuberculosis in a Low TB/MDR-TB Incidence Country

2021 ◽  
Author(s):  
Eiman Mokaddas ◽  
Suhail Ahmad ◽  
Hanaa Eldeen
Keyword(s):  
Extrapulmonary Tuberculosis ◽  
Performance Comparison ◽  
Nucleic Acid Detection ◽  
Smear Microscopy ◽  
Tissue Biopsy ◽  
Negative Culture ◽  
Mdr Tb ◽  
Culture Positive ◽  
Histopathological Evidence ◽  
Better Than

Objective: Early detection and effective treatment are essential for global tuberculosis control. This study evaluated the performance of GeneXpert MTB/RIF (Xpert) and ProbeTec ET (PTec-ET) assays in diagnosing extrapulmonary tuberculosis (EPTB) in Kuwait. Materials and Methods: Nonrespiratory clinical specimens (n=3995) collected from 3995 patients suspected to have EPTB were tested. These included cavitary fluids (n=2054), fine needle aspirate (FNA)/pus/tissue biopsy (n=1461), urine (n=302), cerebrospinal fluid (CSF, n=118), and others (n=60). All specimens were processed for acid-fast bacilli (AFB), culture in MGIT 960 system and nucleic acid detection by Xpert and PTec-ET according to manufacturer’s instructions. Results: Of 3995 specimens, 95 were AFB-positive, 403 were culture-positive and an additional 86 samples had histopathology suggestive of TB. Using culture as reference, the sensitivity and specificity values were 88.33% and 97.3% for Xpert and 72.95% and 97.80% for PTec-ET, respectively. Although performance of both tests was comparable in AFB-positive samples, Xpert detected significantly more cases in culture-positive samples. Among culture-negative samples, Xpert detected 18 more cases including 16 with histopathological evidence of TB. Lowest positivity was detected for both tests in cavitary fluids. Xpert performed better than PTec-ET in culture-positive FNA/pus/tissue biopsy and CSF samples. Conclusions: Although performance of both tests was suboptimal for AFB-negative/culture-positive samples, Xpert performed better than PTec-ET and also detected more cases of AFB-negative/culture-nagative/histopathology-positive samples. PTec-ET was positive in three while Xpert was positive in all six culture-positive CSF specimens for rapid diagnosis of TB meningitis. Xpert was thus superior to PTec-ET or smear microscopy in rapidly diagnosing EPTB.

scholarly journals Cigarette-Smokers’ Problem with STM

2017 ◽  
pp. 130-135
Author(s):  
Rup Kamal ◽  
Ryan Saptarshi Ray ◽  
Utpal Kumar Ray ◽  
Parama Bhaumik
Keyword(s):  
Parallel Processing ◽  
Concurrency Control ◽  
Transactional Memory ◽  
Performance Comparison ◽  
Critical Section ◽  
Parallel Programs ◽  
Software Transactional Memory ◽  
Complex Interactions ◽  
Processor Speed ◽  
Better Than

The past few years have marked the start of a historic transition from sequential to parallel computation. The necessity to write parallel programs is increasing as systems are getting more complex while processor speed increases are slowing down. Current parallel programming uses low-level programming constructs like threads and explicit synchronization using locks to coordinate thread execution. Parallel programs written with these constructs are difficult to design, program and debug. Also locks have many drawbacks which make them a suboptimal solution. One such drawback is that locks should be only used to enclose the critical section of the parallel-processing code. If locks are used to enclose the entire code then the performance of the code drastically decreases. Software Transactional Memory (STM) is a promising new approach to programming shared-memory parallel processors. It is a concurrency control mechanism that is widely considered to be easier to use by programmers than locking. It allows portions of a program to execute in isolation, without regard to other, concurrently executing tasks. A programmer can reason about the correctness of code within a transaction and need not worry about complex interactions with other, concurrently executing parts of the program. If STM is used to enclose the entire code then the performance of the code is the same as that of the code in which STM is used to enclose the critical section only and is far better than code in which locks have been used to enclose the entire code. So STM is easier to use than locks as critical section does not need to be identified in case of STM. This paper shows the concept of writing code using Software Transactional Memory (STM) and the performance comparison of codes using locks with those using STM. It also shows why the use of STM in parallel-processing code is better than the use of locks.

scholarly journals Thermal performance comparison of recycled and clay roof tiles due heat radiation by digital holographic interferometry

2019 ◽  
Vol 65 (6 Nov-Dec) ◽  
pp. 678
Author(s):  
A. Sanchez-Alvarez ◽  
M.H. De la Torre Ibarra ◽  
F. Mendoza Santoyo
Keyword(s):  
Solar Radiation ◽  
Surface Deformation ◽  
Performance Comparison ◽  
Heat Radiation ◽  
Waste Materials ◽  
Comparison Study ◽  
Recycling Process ◽  
Roof Tile ◽  
Out Of Plane ◽  
Better Than

It is through the recycling process that disposed waste materials could regain a new purpose on their use, take for instance the tetrapak™ packaging. This material consists of thermally joint layers of paper, aluminum and polyethylene. Once recycled, the two latter materials form a new composite named poly-aluminum which is employed to manufacture roof tiles that serve as environmental protection against solar radiation and rain. This work reports an optical nondestructive comparison study of the surface deformation in poly-aluminum and clay roof tiles exposed to heat radiation. The optical system based on a sensitive out-of-plane interferometer configuration records several image holograms from a controlled heat source that raises the temperature on the tile’s surface. The retrieved optical phase renders the tiles surface’s deformation for a temperature range of 25 degrees on a Celsius scale. The results show a greater deformation profile from the poly-aluminum tile compared with the classic clay tile. However, its thermal insulation properties are better than those of the clay roof tile.

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