Efficient and effective keyword search over encrypted data in cloud
Searchable Encryption (SE) systems provide cloud information with safety and privacy. The current SE methods allow multiple users to search using various systems such as Broadcast Encryption (BE), Attribute-Based Encryption (ABE), etc. These systems, however, do not allow various users to conduct the search procedure over various owners ' encrypted information. Some SE systems require a Proxy Server (PS) that allows various users to search. However, these approaches incur a huge computational burden on PS due to the repeated encryption of the user queries for transformation purpose to ensure that users’ query is searchable over the encrypted data of multiple owners. Therefore, this project recommends a safe proxy server strategy to eliminate this computational burden on PS that conducts the search procedure without transforming user queries. This method also returns appropriate top-k records to user queries using a similarity method to Euclidean distance. This strategy is effective in terms of search time and precision based on the experimental study. This scheme does not allow making search operations over the data owned by multiple owners that is do not supports search operations in multiple owners and multiple user environments. So we proposed in this project half encryption-based multi-user keyword search over encrypted cloud data. In this project, the data owner creates an index for each document. It encrypts the document collection and sends the encrypted documents over to the cloud server. The words in the indices are partially encrypted with the owner’s secret key and then these indices are sent to the proxy server. This project we have proposed two algorithms IBE algorithm to perform the Encryption. Top Rank, the files, and another algorithm is the TF/IDF algorithm which calculates the term frequency of each keyword.
Published by: Padma Atmakuri, T. G. Ramnadh Babu
Author: Padma Atmakuri
Paper ID: V5I6-1191
Paper Status: published
Published: November 23, 2019
Evaluating factors responsible for inconsistencies in mobile devices digital forensic evidence extraction process model
The proliferation of mobile devices has revolutionized life in the 21st century ranging from the way people socialize to the modes of doing business. Mobile devices contain substantial amounts of private data that in event of crime or security investigations when adduced before any court of law can aid in resolving a number of undetermined causes. However, mobile digital forensics research is still faced with several challenges. Most existing mobile devices digital forensic evidence extraction models are vendor-specific and thus anchored on specific device platforms such as Android, Windows, Apple iOS, and Blackberry. Additionally, these models contain various process inconsistencies and lack specified technical documentation. Further, the growing demand for the mobile devices and crime-related occurrences affecting them has strained and exposed the existing models. A number of questions thus remain unanswered into the factors responsible for these inconsistencies and the lack of a unified model that can be applied across these four operating system platforms. A mixed-method approach involving a survey was used in this study where respondents were drawn from ICT practitioners, law enforcement agencies, researchers and the business community. This study highlights several factors that contribute to digital evidence extraction process model inconsistencies which include policy, extraction methods, nature of data, device type, data type, and extraction tools among others. The study proposes systematic documentation of every step followed during evidence extraction from mobile devices so as to avert the inconsistencies.
Published by: Gilbert Gilibrays Ocen, Mutua Stephen, Gilbert Barasa Mugeni, Karume Simon, Matovu Davis
Author: Gilbert Gilibrays Ocen
Paper ID: V5I6-1177
Paper Status: published
Published: November 23, 2019
Water budgeting and its importance
Water is the physical basis of life. Without sufficient water on the planet earth, the existence of biodiversity is highly impossible. “A water budget is a basic tool that can be used to evaluate the occurrence and movement of water through the natural environment”. India entered the water deficit nations league in 2011. We have an annual financial budget with the estimations of income and expenditure. In the same way, the state water budget is to enable and empower the states to ensure that annual water withdrawals are within the limits of utilizable availability. State Water Budgeting empowers the State Government in achieving Water Security, Safety and Sustainability. The primary stakeholder in the water budgeting exercise is the “Farmer”. This exercise helps the farmer become aware of the water availability at the watershed/village level and make an appropriate agricultural plan. The Crop Water Budgeting (CWB) tool has been developed to assist communities in how to utilize surface and groundwater efficiently without causing further depletion of present resources. The most important advance in modern agriculture is the invention of the drip-irrigation system. Drip method of irrigation (DMI) was introduced in India during the mid-1980s primarily to save water. Now Israel is the world’s leader in farming and irrigation practices. India should learn lessons from Israel by adopting its success story. India is facing a severe water crisis and drought with an increasing population at an alarming rate. So there is an urgent need to establish water recycling units, desalination plants to irrigate agricultural lands and to maintain moisture in barren lands by irrigating them with recycled water and followed by massive introduction of micro-irrigation techniques.
Published by: Dr. T. M. A. Niveditha
Author: Dr. T. M. A. Niveditha
Paper ID: V5I6-1175
Paper Status: published
Published: November 22, 2019
Comparative study on the effects of using natural sand and manufactured sand for the production of C-25 concrete
Manufactured sand is a term used for aggregate materials less than 4.75mm and which are processed from crushed rock or gravel. Due to the booming of construction activities in our country, natural sand resources are increasingly depleted and its cost is becoming increasingly high. This research was, therefore, conducted to study the Effects of Using Natural Sand and Manufactured Sand for The Production Of C-25 Concrete and to assess the prospects of using manufactured sand as a replacement of natural sand in Ethiopia. Initially, different natural and manufactured sand samples to be used in the concrete mixes were collected and their physical properties were studied. Fifteen different concrete mixes having five mix proportions for both natural and manufactured sand (i.e. 100%NS+ 0%MS; 75%NS+25%MS; 50%NS+50%MS; 25%NS+75%MS and 0%Ns+100%MS) were prepared for C-25 Concrete strength using EBCS mix design procedure. The properties of these mixes have then been assessed both at the fresh and hardened state. The using of manufactured sand as a fine aggregate has a significant effect on the workability and finishing ability of the concrete, also, the results of hardened properties of the mixes have shown that concrete mixes with partial proportions of manufactured and natural sand achieved a higher compressive strength at all test ages. The result also has shown that using manufactured sand in partial or full replacement to natural sand doesn’t cause any significant effect on the compressive strength of concrete. It has been found also that the use of manufactured sand is more suitable for high strength concrete production. It can, therefore, be concluded from the findings of this research that when the availability of natural sand is scarce or in cities where the price of natural sand is as expensive as manufactured one, manufactured sand concrete mix is a viable and better alternative to the use of natural sand.
Published by: Mikiyas Alemeshet Abera
Author: Mikiyas Alemeshet Abera
Paper ID: V5I6-1173
Paper Status: published
Published: November 22, 2019
Investigating the effect of poor handling of concrete ingredient in the properties of fresh and harden concrete
Construction materials management is an important element in the management of construction projects. One of the construction materials widely used in construction projects is concrete. Concrete is one of the important constituents of many of the construction projects, in addition to its subjectivity to variability, requires a close and thorough care and handling in construction projects. The constituents of concrete, in which majority of them occur naturally, are subjected to a wide range of variability and quality problems. Therefore, with this respect, a research was carried out and the objective of this experimental study was to investigate the effect of poorly handled concrete ingredients in the properties of fresh and harden concrete to assess the effect. The ingredients were collected from Five (5) active construction sites around the study area and they wear ready for use when the sample was taken for the research purpose. A laboratory test was conducted for each ingredient before the preparation of concrete. After that mix design was prepared specifically for C-25 concrete then by using weight batching the ingredients are introduced to electrical mixer, after the mix prepared, workability, setting time, and compaction factor test was conducted to identify the properties of the fresh concrete and then a total of 45 concrete cube sample was cast or three (3) sample for each source of the ingredients and for each testing day, the compressive strength test was conducted on the 7th, 14th and 28th day. For the workability test, both slump test and flow table tests were conducted and the result shows that the concrete mix has high workability and the slump is collapse slump and this result is due to the high-water content on both coarse and fine aggregate. the initial setting time of the concrete mix was greater than the ASTM standard specification due to the impurities present in the mixing water also the mix has a high compaction factor test result due to the high workability of the mix or due to self-consolidating property of the concrete mix. The average compressive strength of the concrete after 28th day was not satisfied with the desired strength also the 7th day and the 14th-day compressive strength was less than 60% and 90% respectively of the desired 28th day compressive strength. The result is occurred due to low aggregate crushing value, high silt content of fine aggregate, water impurities and high-water content in the mix. The result shows that the effect of poor handling of concrete ingredients in the properties of fresh and hardened concrete.
Published by: Mikiyas Alemeshet Abera
Author: Mikiyas Alemeshet Abera
Paper ID: V5I6-1171
Paper Status: published
Published: November 22, 2019
Study of ZnO Nanoparticles for Gas Sensing Application
This report presents a brief discussion on the importance of ZnO nanomaterial in gas sensing applications. Recent developments on ZnO-based gas sensors have been reviewed. The primary work in this report involves the study of the Raman spectrum of a ZnO wurtzite sample. Using the group theoretical background, the various vibrational modes of the ZnO wurtzite have been studied at length. Finally, the defect properties of ZnO wurtzite, mainly the oxygen vacancy defect which plays an important role in a gas sensing application, have been investigated
Published by: Mriganko Bastav Chakravertty
Author: Mriganko Bastav Chakravertty
Paper ID: V5I6-1160
Paper Status: published
Published: November 22, 2019
