OSUOLALE FESTUS ADEYINKA
Publication
In the emerging and keenly competitive telecommunications market, it is imperative for mobile telecom operators to carry out regular analysis of their massive stored call logs to maintain and manage their numerous subscribers. Such sequential stream data analysis requires an efficient data mining algorithm and techniques bearing in mind the challenges posed by its massive size. Many data mining applications have been adapted for similar purposes. However, there has not been much emphasis on an in-depth mining of call detail records (CDR) as a multidimensional sequential stream data with its attending storage overhead. This paper proposes a novel algorithm for the multidimensional analysis of call records. Pattern Cube Algorithm (PCA) was implemented with a computer program and established empirically that: a massive CDR can be meaningfully summarized into a handy record as data mart with a gain of about 90% reduction in size and the possibility of processing a huge data from any server irrespective of the size of the target data. A quantitative exploration of the various gains in IT resources is conducted through an extensive experimental study on a sample of CDR adapted from MTN Communications Nigeria Limited.
Imagine a web-application in which a user can query varieties of information about an individual (like name, age, state of origin, driver’s license number, national identification number, etc.). This information would be stored on different databases, each having its own schema. Often times, these resources are replicated in different locations and on different platforms. Hence, the need for data harmonization or integration. Data harmonization addresses this issue by considering these external resources as materialized views over a virtual mediated schema resulting in “virtual data integration”. When mediated schema is queried, the solution transforms the result into appropriate queries over the various and existing data sources. This paper focuses on data harmonization that cuts across different governmental database and incorporating them all into a centralized view and this is possible as a result of development and implementation of a web-based databank application.
The art of hiding information has been on for centuries and improvement and advancement have always accompanied information security to ensure the message gets to the intended recipient without compromise. Over the years, cryptography and steganography are the two major methods for securing, hiding and transmission of messages separately. The methods used information in order to cipher or cover their existence respectively. Cryptography is an art and science of hiding messages to introduce secrecy in data and/or information security while steganography is simply the art of secret writing, Crypto-steganographic method is aimed at amalgamating both the cryptography and steganography methods for a better information security. The primary purpose of this paper is to build up a new method of hiding secret text messages in an image, by combining cryptography and steganography. A new algorithm is proposed and implemented to achieve this. LSB method is used to hide the encrypted message into images while MSE and PSNR are used to acquire the quality of images.
Security is the degree of resistance to, or protection from harm. It applies to any vulnerable and valuable asset, such as person, community, nation, or organization. Thus, the determination of a user being allowed access to a resource(s) is done cautiously. Alphanumeric password has been used for authentication, however, it is inherently limited. Graphical password is a possible alternative. Consequently, this paper designs a new graphical password technique based on images, rather than alphanumeric strings. Although, graphical password technique is more secure than textual password. It is also vulnerable to attacks. The most common problem therefore with Graphical Password is the Shoulder Surfing problem, also called “PEEPING ATTACK”. In this paper, we proposed a user authentication technique called “FAKEPOINTER”- a user authentication technique that conceals users’ authentication secret regardless of a shoulder surfer success by video camera(s). In the software designed, a graphical password fake indicator (pointer) is incorporated to enhance users’ login (password) against attack. The system is designed to run on windows platform with .Net support with Microsoft Structured Query Language Server as the back end, C# as front end. The system performs better when compared to existing system.
A risk is the possibility that an undesirable event could happen. Different methodologies have been proposed to assess and manage IT risks each of which is divided into processes and steps. Two specific methods of interest in this work are: “Risk Matrices” and “Risk Registers”. A generic Risk Register application module and an updatable Risk Matrix module were designed. This work studies risk management techniques and employs a custom model for the automated assessment of IS risks. This model was implemented in phases corresponding to its aspects. The “Assessment methods” of interest to this work are Risk Registers, Risk Matrices and the Scenario Geek”. What-if analysis is a data-intensive simulation whose goal is to inspect the behavior of a complex system under some given hypotheses called scenarios. What-ifs are used to generate qualitative descriptions of potential problems in the form of questions and responses lists of recommendations for preventing problems. The Risk Assessor was developed using Microsoft’s Visual Basic.Net with Active Server Pages (ASP.Net) Technologies on .Net Framework 4.0. The solution propounded in this work is a good risk management application that provides upward assurance from information technology security issues, business activities and administrative functions and ultimately to anyone that chooses to adopt it.
Cryptography is the science of writing in secret codes which can be achieved either by using software encrypter or hardware encrypter. This study presents the development of a pair of circuit system-based (hardware) cryptographic processor. The hardware encryption in this study was achieved using the bitwise logic operations in the registers of the microcontroller and messages are streamed as serial ASCII data from the PC through the USB port to the microcontroller unit. The encryption is performed on each ASCII representation using a pass key embedded in the microcontroller unit. Decryption process is similar but in the reverse order. A comparative analysis of the encryption time for the hardware-based data encryption was made and findings recorded. The processor was implemented using PIC18F4550 microcontroller mounted on a Printed Circuit Board alongside other components to achieve the hardware based circuitry. The software end of the encryption and decryption algorithm was developed based on a library built into C Language Visual Studio version 2010 and the CCS C compiler for communication protocol stack.
Multicast packets authentication major challenges are high computation overhead incurred while signing multicast streams and authentication difficulty when there is one or more packet losses. In this paper, Information Dispersal Algorithm was used to construct the hash of each packet with the hash values of individual packets concatenated over multiple packets. Authentication scheme for Multicast message packets design was based on signature amortization technique. This reduces the computation overhead and ensures verification when there is packet loss. The design was simulated with a number of messages sent to a chosen number of receivers. Probabilities of loss were calculated for each transmission. The performance was compared with three other existing schemes to ascertain its efficiency. It was observed that our technique is efficient in packets authentication in a lossy environment especially with reduced space overhead.
