scholarly journals An Optimal Teaching and Learning based Optimization with Multi-Key Homomorphic Encryption for Image Security

2021 ◽  
pp. 77-84
Author(s):  
Mustafa s Khalifa ◽  
◽  
◽  
Ahmed N. Al Al-Masri
Keyword(s):  
Teaching And Learning ◽  
Signal To Noise Ratio ◽  
Homomorphic Encryption ◽  
Fitness Function ◽  
Tlbo Algorithm ◽  
Secret Keys ◽  
Major Carrier ◽  
Multiple Keys ◽  
Result Analysis

Due to the drastic rise in multimedia content, digital images have become a major carrier of data. Generally, images are communicated or archived via wireless communication changes, and the significance of data security gets increased. In order to accomplish security, encryption is an effective technique which is used to encrypt the images using secret keys in such a way that it is not readable by the hacker. In this view, this study focuses on the design of Teaching and Learning based Optimization (TLBO) with Multi-Key Homomorphic Encryption (MHE) technique, called MHE-TLBO algorithm. The goal of the MHE-TLBO algorithm is to optimally select multiple keys using TLBO algorithm for encryption and decryption processes. In addition, the MHE-TLBO algorithm has derived a fitness function involving peak signal to noise ratio (PSNR) and thereby ensures the superior quality of the reconstructed image. For validating the security performance of the MHE-TLBO algorithm, a comprehensive result analysis is made and the simulation results ensured the betterment of the MHE-TLBO algorithm interms of different aspects.

Computing Blindfolded on Data Homomorphically Encrypted under Multiple Keys: A Survey

2022 ◽  
Vol 54 (9) ◽  
pp. 1-37
Author(s):  
Asma Aloufi ◽  
Peizhao Hu ◽  
Yongsoo Song ◽  
Kristin Lauter
Keyword(s):  
Homomorphic Encryption ◽  
Lessons Learned ◽  
Secret Key ◽  
Sensitive Data ◽  
Encrypted Data ◽  
Outsourced Computation ◽  
Secret Keys ◽  
Comprehensive Survey ◽  
Multiple Keys ◽  
Cryptographic Techniques

With capability of performing computations on encrypted data without needing the secret key, homomorphic encryption (HE) is a promising cryptographic technique that makes outsourced computations secure and privacy-preserving. A decade after Gentry’s breakthrough discovery of how we might support arbitrary computations on encrypted data, many studies followed and improved various aspects of HE, such as faster bootstrapping and ciphertext packing. However, the topic of how to support secure computations on ciphertexts encrypted under multiple keys does not receive enough attention. This capability is crucial in many application scenarios where data owners want to engage in joint computations and are preferred to protect their sensitive data under their own secret keys. Enabling this capability is a non-trivial task. In this article, we present a comprehensive survey of the state-of-the-art multi-key techniques and schemes that target different systems and threat models. In particular, we review recent constructions based on Threshold Homomorphic Encryption (ThHE) and Multi-Key Homomorphic Encryption (MKHE). We analyze these cryptographic techniques and schemes based on a new secure outsourced computation model and examine their complexities. We share lessons learned and draw observations for designing better schemes with reduced overheads.

scholarly journals Two-Party Secure Computation for Any Polynomial Function on Ciphertexts under Different Secret Keys

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Bingbing Jiang
Keyword(s):  
Polynomial Function ◽  
Homomorphic Encryption ◽  
Auxiliary Information ◽  
Secure Computation ◽  
Encryption Algorithm ◽  
Fully Homomorphic Encryption ◽  
Simple Scheme ◽  
Secret Keys ◽  
Learning With Errors ◽  
Multiple Keys

Multikey fully homomorphic encryption proposed by Lopez-Alt et al. (STOC12) is a significant primitive that allows one to perform computation on the ciphertexts encrypted by multiple different keys independently. Then, several schemes were constructed based on decisional small polynomial ratio or learning with errors. These schemes all require an expansion algorithm to transform a ciphertext under a single key into an encryption of the same message under a set of keys. To achieve the expansion algorithm without interaction with these key-keepers, their encryption algorithm not only outputs a ciphertext of a plaintext but also exports auxiliary information generated from the randomness used in the former encryption process. Beyond that, the size of the ciphertext encrypted by multiple keys increases linearly or quadratically in the number of participants. In this paper, we studied the problem whether someone can directly perform arbitrary computation on ciphertexts encrypted by different keys without any auxiliary information in the output of the encryption algorithm and an increase in the size of the ciphertext in the expansion algorithm. To this end, we proposed a novel and simple scheme of secure computation on ciphertexts under two different keys directly without any auxiliary information. In other words, each party just provides its own ciphertexts encrypted by the GSW scheme (CRYPTO13). In the procedure of executing evaluation on these ciphertexts, the size of the new ciphertext remains the same as that of the GSW ciphertext.

PENERAPAN iLEARNING SURVEY (iSur) DALAM MENINGKATKAN KUALITAS SISTEM INFORMASI SELAMA PROSES PEMBELAJARAN DI PERGURUAN TINGGI RAHARJA

CCIT Journal ◽  
2014 ◽  
Vol 7 (3) ◽  
pp. 335-354
Author(s):  
Untung Rahardja ◽  
Muhamad Yusup ◽  
Ana Nurmaliana
Keyword(s):  
Higher Education ◽  
Student Satisfaction ◽  
Teaching And Learning ◽  
Online Survey ◽  
The Other ◽  
Learning Activities ◽  
Faculty Performance ◽  
Satisfaction Measurement ◽  
Valid Information

The accuracy and reliability is the quality of the information. The more accurate and reliable, the more information it’s good quality. Similarly, a survey, the better the survey, the more accurate the information provided. Implementation of student satisfaction measurement to the process of teaching and learning activities on the quality of the implementation of important lectures in order to get feedback on the assessed variables and for future repair. Likewise in Higher Education Prog has undertaken the process of measuring student satisfaction through a distributed questioner finally disemester each class lecture. However, the deployment process questioner is identified there are 7 (seven) problems. However, the problem can be resolved by the 3 (three) ways of solving problems one of which is a system of iLearning Survey (Isur), that is by providing an online survey to students that can be accessed anywhere and anytime. In the implementation shown a prototype of Isur itself. It can be concluded that the contribution Isur system can maximize the decision taken by the Higher Education Prog. By using this Isur system with questions and evaluation forms are submitted and given to the students and the other colleges. To assess the extent to which the campus has grown and how faculty performance in teaching students class, and can be used as a media Isur valid information for an assessment of activities throughout college.

Pre-Processing of Hyperspectral Images Using Nonlinear Filters

2013 ◽  
Vol 11 (1) ◽  
pp. 8-13
Author(s):  
V. Behar ◽  
V. Bogdanova
Keyword(s):  
Signal To Noise Ratio ◽  
Correlation Coefficients ◽  
Hyperspectral Images ◽  
Spectral Correlation ◽  
Edge Preserving ◽  
Improvement Factor ◽  
Filter Output ◽  
Average Improvement ◽  
Processing Procedure

Abstract In this paper the use of a set of nonlinear edge-preserving filters is proposed as a pre-processing stage with the purpose to improve the quality of hyperspectral images before object detection. The capability of each nonlinear filter to improve images, corrupted by spatially and spectrally correlated Gaussian noise, is evaluated in terms of the average Improvement factor in the Peak Signal to Noise Ratio (IPSNR), estimated at the filter output. The simulation results demonstrate that this pre-processing procedure is efficient only in case the spatial and spectral correlation coefficients of noise do not exceed the value of 0.6

Classroom Management

2016 ◽  
Vol 1 (1) ◽  
pp. 201
Author(s):  
Elida Kurti
Keyword(s):  
Classroom Management ◽  
General Education ◽  
Urban Areas ◽  
Teaching And Learning ◽  
Educational Institutions ◽  
Important Place ◽  
Rural And Urban Areas ◽  
Rural And Urban ◽  
Intellectual Level

This paper aims to reflect an effort to identify the problems associated with the educational learning process, as well as its function to express some inherent considerations to the most effective forms of the classroom management. Mentioned in this discussion are ways of management for various categories of students, not only from an intellectual level, but also by their behavior. Also, in the elaboration of this theme I was considering that in addition to other development directions of the country, an important place is occupied by the education of the younger generation in our school environments and especially in adopting the methods of teaching and learning management with a view to enable this generation to be competitive in the European labor market. This, of course, can be achieved by giving this generation the best values of behavior, cultural level, professional level and ethics one of an European family which we belong to, not just geographically. On such foundations, we have tried to develop this study, always improving the reality of the prolonged transition in the field of children’s education. Likewise, we have considered the factors that have left their mark on the structure, cultural level and general education level of children, such as high demographic turnover associated with migration from rural and urban areas, in the capacity of our educational institutions to cope with new situations etc. In the conclusions of this study is shown that there is required a substantial reform even in the pro-university educational system to ensure a significant improvement in the behavior of children, relations between them and the sound quality of their preparation. Used literature for this purpose has not been lacking, due to the fact that such problems are usually treated by different scholars. Likewise, we found it appropriate to use the ideas and issues discussed by the foreign literature that deals directly with classroom management problems. All the following treatise is intended to reflect the way of an effective classroom management.

Article Review: The Impact of Fun and Enjoyment on Adult Learning

2019 ◽  
Vol 1 (2) ◽  
pp. 96
Author(s):  
Laily Yahya
Keyword(s):  
Adult Learners ◽  
Adult Learning ◽  
Teaching And Learning ◽  
Educational Programme ◽  
Continuous Quality ◽  
Teachers Beliefs ◽  
Critical Issues ◽  
Affective Experiences ◽  
The Impact

The article review of ‘The Impact of Fun and Enjoyment on Adult Learning’ (Lucardie, 2014) opens doors to the kaleidoscope of fun and enjoyment amongst adult learners. The essence of this review is an informative snapshot on the critical issues of how fun and joy have impacted adult learning through a qualitative research drawing upon traditions of phenomenology. It aims to explore the affective experiences of fun and enjoyment. This article review attempts to highlight an insightful assessment of the ideas and the arguments that are being discussed by the author. The different interpretation of this concept draws out contrasting elements between learners and teachers’ beliefs. A twist to this review is a reflective stance procured to address central issues emerging in the article related to the Malaysian context. It is through the lens of the reader, Continuous Quality Improvement (CQI):4R is proposed. This refers to the process of continuously improving the quality of teaching and learning of an educational programme. This review concludes with the framing of CQI:4R to illustrate reflect, revisit, realign and reconstruct processes that could possibly navigate the architectural landscape of the Malaysian Teacher Education.

EL PENSAMIENTO CRÍTICO EN LA EDUCACIÓN DE POSGRADO: PROPUESTA DE UN MODELO PARA SU INTEGRACIÓN AL PROCESO EDUCATIVO

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Carlos Manosalvas Vaca ◽  
Luis Manosalvas Vaca ◽  
Ruth Barba
Keyword(s):  
Higher Education ◽  
Critical Thinking ◽  
Detailed Analysis ◽  
Teaching And Learning ◽  
Learning Processes ◽  
Educación Superior ◽  
Educacion Superior ◽  
Educational Processes ◽  
Palabras Clave

La presente investigación, analiza los conceptos más importantes del pensamiento Crítico, así como su importancia y utilidad en los procesos de formación profesional a nivel de Posgrado. Se hace un análisis detallado de los conceptos más ampliamente aceptado y de los factores inmersos en el desarrollo y aplicación de este tipo de pensamiento. Finalmente se propone un modelo que engloba los conceptos y factores analizados y como se interrelacionan entre ellos; el objetivo final es brindar a los docentes y directivos de Instituciones de Educación Superior, una herramienta que posibilite la inclusión de este tipo de pensamiento en sus procesos enseñanza-aprendizaje con el fin último de mejorar la calidad de los procesos de formación. Palabras Clave: Pensamiento Crítico, Educación Superior, Educación ABSTRACT This research analyzes the most important concepts of critical thinking as well as their importance and usefulness for the educational processes at graduate level. A detailed analysis of the most widely accepted concepts and factors involved in the development and application of this kind of thinking has been made. Finally, a model that includes the concepts and analyzed factors and their interrelations is proposed; the ultimate goal is to provide teachers and directors of Institutions in Higher Education, a tool that enables the inclusion of this type of thinking in their teaching and learning processes with the ultimate intention of improving the quality of the training processes. Keywords: Critical thinking, Higher Education, Education Recibido: mayo de 2016Aprobado: septiembre de 2016

Pembelajaran Kooperatif Tipe Jigsaw dalam Pembelajaran Fisika

2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Jawane Malau
Keyword(s):  
Cooperative Learning ◽  
Learning Process ◽  
Teaching And Learning ◽  
Learning Model ◽  
Student Response ◽  
Learning Tools ◽  
Learning Group ◽  
Learning Plan ◽  
Quality Of Teaching

<p>This research was conducted for the purpose of getting a clear and complete <br />picture conserning the quality of teaching and learning process through eveloping and implementing jigsaw type cooparative learning model for subject of Thermodynamics. The quality of teaching and learning process can be viewed by positive response of university students towards thermodynamics subject using the implemented jigsaw type cooparative learning model. The subject of this research were students of high school class X, semester II in the academic year of 2011/2012, which were listed as learning tools needed for thermodynamics of jigsaw type cooparative learning model. The learning tool which were being developed consist of teaching materials, learning plan, and student worksheet. The research prosedure consisted of developing the tools of teaching and learning process, and the followed by realization of learning in class using the jigsaw type cooparative learning approach. The research instruments were to be observation sheet and student response questionaire towards the learning process. The reseach data were analyzed using percentage statistic. Based on the refection result towards the action which was planned beforehand and also the researh result discussion, it was found that the learning process of hermodynamics which was done by implementing the jigsaw type cooparative learning model can increase student activity in his study. Implementing the jigsaw type cooperative learning can increase the learning result of students. Most of the students who partisipated in the thermodynamics class agree and give a positive apreciation towards the implementation of cooperative learning model. They believe that with the learning group can help them overcoming the learning deterrent. </p><p> </p>

Image Quality Enhancing by Efficient Histogram Equalization

2014 ◽  
Vol 2 (2) ◽  
pp. 47-58
Author(s):  
Ismail Sh. Baqer
Keyword(s):  
Image Quality ◽  
Contrast Enhancement ◽  
Mean Squared Error ◽  
Signal To Noise Ratio ◽  
Histogram Equalization ◽  
Gray Level ◽  
Signal To Noise ◽  
Squared Error ◽  
Noise Ratio

A two Level Image Quality enhancement is proposed in this paper. In the first level, Dualistic Sub-Image Histogram Equalization DSIHE method decomposes the original image into two sub-images based on median of original images. The second level deals with spikes shaped noise that may appear in the image after processing. We presents three methods of image enhancement GHE, LHE and proposed DSIHE that improve the visual quality of images. A comparative calculations is being carried out on above mentioned techniques to examine objective and subjective image quality parameters e.g. Peak Signal-to-Noise Ratio PSNR values, entropy H and mean squared error MSE to measure the quality of gray scale enhanced images. For handling gray-level images, convenient Histogram Equalization methods e.g. GHE and LHE tend to change the mean brightness of an image to middle level of the gray-level range limiting their appropriateness for contrast enhancement in consumer electronics such as TV monitors. The DSIHE methods seem to overcome this disadvantage as they tend to preserve both, the brightness and contrast enhancement. Experimental results show that the proposed technique gives better results in terms of Discrete Entropy, Signal to Noise ratio and Mean Squared Error values than the Global and Local histogram-based equalization methods

Administrasi Layanan Khusus

2020 ◽  
Author(s):  
Haisya Hamini
Keyword(s):  
Learning Process ◽  
Teaching And Learning ◽  
School Health ◽  
Service Management ◽  
Educational Goals ◽  
Guidance And Counseling ◽  
School Based ◽  
Special Services ◽  
School Cafeterias

This article describes the administration of special services. The teaching and learning process requires the support of facilities that are not directly used in the classroom. Facilities that do not directly include school libraries, school cooperatives, school health businesses and school cafeterias. Management of special services in schools is effective and efficient School Based Management (SBM). School is one of the facilities that can be used to improve the quality of Indonesia's population. Schools not only have responsibilities and duties to carry out the learning process in developing science and technology, but must maintain and improve students' physical and spiritual health.Special service management in schools is basically defined and organized to facilitate or facilitate learning, and can meet the special needs of students at school. Special services are provided in schools with a view to facilitating the implementation of teaching in the context of achieving educational goals in schools. Special services include guidance and counseling, libraries, laboratories, school health efforts (uks), canteens, school cooperatives, and transportation.

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