Frimpong Twum - Academia.edu (original) (raw)
Papers by Frimpong Twum
Data security is a crucial concern that ought to be managed to help protect vital data. Cryptogra... more Data security is a crucial concern that ought to be managed to help protect vital data. Cryptography is one of the conventional approaches for securing data and is generally considered a fundamental data security component that provides privacy, integrity, confidentiality, and authentication. In this paper, a hybrid data security algorithm is proposed by integrating traditional RSA and Gaussian Interpolation formulas. The integration raises the security strength of RSA to the fifth degree. The Gaussian First Forward Interpolation is used to encrypt the ASCII values of the message after which the traditional RSA is used to encrypt and decrypt the message in the second and third levels. The last stage employs Gaussian Backward Interpolation to decrypt the data again. The integration helps to cater to the factorization problem of the traditional RSA. Comparative analysis was performed using four different algorithms; RSA, SRNN, 2-Key pair algorithms, and the proposed algorithm. It is p...
2021 International Conference on Electrical, Computer and Energy Technologies (ICECET), 2021
Image pre-processing methods are intended to enhance some image features important for further pr... more Image pre-processing methods are intended to enhance some image features important for further processing including edge detection or object recognition. Preprocessing is very crucial in image processing applications for noise removal and also for suppressing or highlighting other attributes. This study seeks to preprocess medicinal plant leaf images by enhancing the quality of the images using a combined Homomorphic filter and Contrast Limited Adaptive Histogram Equalization. The study also segments the image from its background using the OTSU global thresholding algorithm. Image enhancement and segmentation performance metrics are further used to determine the efficiency of the proposed method. It was realized from the experiment using MATLAB that the proposed method outperformed the Contrast Limited Adaptive Histogram Equalization in terms of the Peak Signal to Noise ratio, Mean Square Error, Mean Absolute Error for the image enhancement and Jaccard Index, DICE Index and Matthews Correlation Coefficient metric for the image segmentation.
2021 International Conference on Electrical, Computer and Energy Technologies (ICECET), 2021
Every firm survives on data, which is an essential resource. In our contemporaries, it is not jus... more Every firm survives on data, which is an essential resource. In our contemporaries, it is not just the possession of the data that is crucial but the protection that can be offered to ensure its safety and utilization. This study presents the application of Reed Solomon error-correcting coding scheme and two variants of elliptic curve cryptosystems, namely: Elliptic Curve Integrated Encryption Scheme and Fast Elliptic Curve Digital Signature Algorithm to improve the integrity and confidentiality of data. A data protection framework that combines both encryption and encoding schemes to offer integrity and confidentiality to data. The framework draws on the strengths of both encryption and encoding schemes to secure medium and protect data in transit and at storage. The protection scheme obfuscates and signs data in transit by using the Elliptic Curve Cryptographic algorithms to prevent unauthorized access and modification. The Reed Solomon encoding scheme is utilized to correct any corrupted data, in order to maintain the integrity of data.
Journal of Computer Science, 2021
International Journal of Advanced Computer Science and Applications, 2021
The importance of basic education is well noted in every country. Proper planning and utilization... more The importance of basic education is well noted in every country. Proper planning and utilization of resources at the basic level, helps in leveraging the success of education at all other levels of education in a country. Ghana is noted to be the country that spends higher in education than its West African counterparts. In Ghana, attempts made to plan by predicting and projecting expenditure as well as the available resources to manage basic education are not accurate enough to address the challenges of education in the country. With the issue of COVID 19 pandemic, more expenditure is realized in managing educational institutions as more resources are needed in observing the protocols to curtail the pandemic. This throws a serious challenge to the effective and efficient utilization of the limited resources in the country. In this paper, the data from the Ministry of Education is analysed using data mining techniques. This has helped to identify the inaccuracies in the data. Inaccurate population projection affects the Key Performance Indicators (KPIs) in education because population is a common denominator for educational indicators. A proposed expert system is to be developed to assist in managing the situation.
Sensors, 2021
Chaos theory and its extension into cryptography has generated significant applications in indust... more Chaos theory and its extension into cryptography has generated significant applications in industrial mixing, pulse width modulation and in electric compaction. Likewise, it has merited applications in authentication mechanisms for wireless power transfer systems. Wireless power transfer (WPT) via resonant inductive coupling mechanism enables the charging of electronic devices devoid of cords and wires. In practice, the key to certified charging requires the use of an authentication protocol between a transmitter (charger) and receiver (smartphone/some device). Via the protocol, a safe level and appropriate charging power can be harvested from a charger. Devoid of an efficient authentication protocol, a malicious charger may fry the circuit board of a receiver or cause a permanent damage to the device. In this regard, we first propose a chaos-based key exchange authentication protocol and analyze its robustness in terms of security and computational performance. Secondly, we theoret...
1,2,3 Department of Computer Science Kwame Nkrumah University of Science and Technology, Kumasi, ... more 1,2,3 Department of Computer Science Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract As developers endeavour to improve on solving world issues through software technology so are they interested in building robust applications with greater performance. PHP application maintenance becomes difficult and performance compromised, if the applications are developed as a core without frameworks. With the increasing number of frameworks, it is difficult to choose which framework has good performance for development. Two similar web applications were developed in two PHP frameworks (Laravel and CodeIgniter) and Jmeter used to test the performance (Load and Stress) of the applications. Assessment indicated that there is significant variation in performance between Laravel and CodeIgniter on a local setup regarding response time...
International Journal of Computer Applications, 2018
International Journal of Computer Network and Information Security, 2019
The decision to use either Cloud Computing (CC) applications or Traditional Information Technolog... more The decision to use either Cloud Computing (CC) applications or Traditional Information Technology Outsourcing (Traditional ITO) environments is a function of the security evaluations of these two options. Hackers are constantly nosing around websites and other computer networks for compromised computers that have some vulnerabilities to exploit them. Vulnerabilities in cloud computing and Traditional ITO environments are leading causes of recent data breaches. These breaches provide opportunities to hackers to attack and gain access to customer information such as credit cards and contact information, passwords, sending of malicious codes to website users or making users computer potential candidates of botnets and to hijack the sessions of authentic users to make unapproved purchases on their behalf. In this paper, security penetration tools have been employed to evaluate the security vulnerabilities of cloud-based solutions and Traditional ITO to discover possible vulnerabilities, their causes and mitigation strategies to securing web applications from the discovered vulnerabilities. Some web applications and a Traditional ITO network were ethically hacked to discover vulnerabilities in them. Analyses of the results obtained through the ZAP scan flagged Remote File Inclusion (RFI) alert were high priority alert. In all, RFI constitutes the most serious potential threat and it needs the fullest attention of CC service providers. Nmap disclosed opened ports in Traditional ITO Virtual Private Network which can make the server of the provider accessible to hackers leading to a considerable disclosure of information to unauthorized users.
International Journal of Computer Applications, May 17, 2018
International Journal of Computer Applications, 2020
International Journal of Computer Applications, 2020
Prior studies have established the security of resources outsourced for cloud storage heavily pre... more Prior studies have established the security of resources outsourced for cloud storage heavily preys on subscribers' minds. Existing cloud security frameworks classified as direct architectures (such as provided by DropBox, Box, Google, BackBlaze B2) and indirect architectures provided by the Cloud Access Security Brokers (CASB)/Security as a Service (SECaaS) providers have been found to be inadequate in assuring the cloud subscriber of the security of resources in terms data corruption, privacy, and performance in recovering data. This study employed an experimental lab setup using JAVA, SQL, and PHP to develop the Cloud Data Distribution Intermediary (CDDI) framework into software system dubbed Secure My Files (SMF). The SMF system provides users a choice of selecting one of four data priority levels (Low, Normal, Important, or Critical) at the time of uploading their data resource for cloud storage. The priority level selected determines: the uploading and downloading process the system uses, the amount of data that can be recovered in the event of data corruption, and the performance during data recovery. The security strength of the SMF system in relation to assuring of confidentiality, Integrity, and Availability of cloud data was found to be much 1 / 3
International Journal of Computer Applications, 2019
International Journal of Computer Applications, 2019
International Journal of Computer Applications, 2019
International Journal of Computer Applications, 2019
Analyzing the spatiotemporal distribution of tuberculosis (TB) is a very important way to underst... more Analyzing the spatiotemporal distribution of tuberculosis (TB) is a very important way to understand its epidemiology thereby helping to identify geographic regions at higher risk and to enable proper control and resource allocation. This study was undertaken to ascertain the spatiotemporal distribution of TB cases and treatment outcomes in the Birim Central Municipality (BCM) in the Eastern Region (E/R) of Ghana for the period 2012-2016 and to recommend appropriate preventive measures. In this retrospective study, the locations of the total of 268 TB cases identified from 2012-2016 were geocoded on the BCM digital maps. Spatial visualization using choropleth maps, network analysis, and service area analysis of ArcGIS10.2 was used to identify the geographic concentration of cases and the various treatment outcomes as well as proximity of patient community to health facility. A questionnaire was also used to collect primary data from TB patients diagnosed in year 2017. This data was analyzed using SPSS version 21. The study identified five main communities as hot spots of TB in the municipality with variations in other communities. It was also found that other non-spatial factors such as socioeconomic factors and stigmatization highly influence treatment outcome.
![Research paper thumbnail of A Proposed Algorithm for Generating the Reed-Solomon Encoding Polynomial Coefficients over GF(256) for RS[255,223]8,32](https://attachments.academia-assets.com/85341680/thumbnails/1.jpg)
](International Journal of Computer Applications, 2016
Communications on Applied Electronics, 2016
Universities in Ghana to which UMaT is no exception are under constant pressure to provide their ... more Universities in Ghana to which UMaT is no exception are under constant pressure to provide their communities with reliable internet access. As internet connectivity is increasingly becoming a strategic resource, having a robust campus network with good connectivity to the internet is no longer a luxury, but in actual sense now a basic necessity. UMaT has a robust LAN infrastructure which faces some challenges attributable to limited bandwidth of 45 MB, misuse of the bandwidth on low priority bandwidth hungry applications, and lack of effective user access control. This research aimed at studying the behavior patterns of network users and deploy an enhanced network access control using freeBSD pfSense open source software as the dedicated perimeter firewall with the introduction of squid, squidGuard, Squid Analysis Report Generator (SARG) and the setting up of an Active Directory server with user access policies to improve user access control and insulate the LAN from misuse and virus attacks.
International Journal of Computer Applications, 2016
Communications on Applied Electronics, 2016
Data security is a crucial concern that ought to be managed to help protect vital data. Cryptogra... more Data security is a crucial concern that ought to be managed to help protect vital data. Cryptography is one of the conventional approaches for securing data and is generally considered a fundamental data security component that provides privacy, integrity, confidentiality, and authentication. In this paper, a hybrid data security algorithm is proposed by integrating traditional RSA and Gaussian Interpolation formulas. The integration raises the security strength of RSA to the fifth degree. The Gaussian First Forward Interpolation is used to encrypt the ASCII values of the message after which the traditional RSA is used to encrypt and decrypt the message in the second and third levels. The last stage employs Gaussian Backward Interpolation to decrypt the data again. The integration helps to cater to the factorization problem of the traditional RSA. Comparative analysis was performed using four different algorithms; RSA, SRNN, 2-Key pair algorithms, and the proposed algorithm. It is p...
2021 International Conference on Electrical, Computer and Energy Technologies (ICECET), 2021
Image pre-processing methods are intended to enhance some image features important for further pr... more Image pre-processing methods are intended to enhance some image features important for further processing including edge detection or object recognition. Preprocessing is very crucial in image processing applications for noise removal and also for suppressing or highlighting other attributes. This study seeks to preprocess medicinal plant leaf images by enhancing the quality of the images using a combined Homomorphic filter and Contrast Limited Adaptive Histogram Equalization. The study also segments the image from its background using the OTSU global thresholding algorithm. Image enhancement and segmentation performance metrics are further used to determine the efficiency of the proposed method. It was realized from the experiment using MATLAB that the proposed method outperformed the Contrast Limited Adaptive Histogram Equalization in terms of the Peak Signal to Noise ratio, Mean Square Error, Mean Absolute Error for the image enhancement and Jaccard Index, DICE Index and Matthews Correlation Coefficient metric for the image segmentation.
2021 International Conference on Electrical, Computer and Energy Technologies (ICECET), 2021
Every firm survives on data, which is an essential resource. In our contemporaries, it is not jus... more Every firm survives on data, which is an essential resource. In our contemporaries, it is not just the possession of the data that is crucial but the protection that can be offered to ensure its safety and utilization. This study presents the application of Reed Solomon error-correcting coding scheme and two variants of elliptic curve cryptosystems, namely: Elliptic Curve Integrated Encryption Scheme and Fast Elliptic Curve Digital Signature Algorithm to improve the integrity and confidentiality of data. A data protection framework that combines both encryption and encoding schemes to offer integrity and confidentiality to data. The framework draws on the strengths of both encryption and encoding schemes to secure medium and protect data in transit and at storage. The protection scheme obfuscates and signs data in transit by using the Elliptic Curve Cryptographic algorithms to prevent unauthorized access and modification. The Reed Solomon encoding scheme is utilized to correct any corrupted data, in order to maintain the integrity of data.
Journal of Computer Science, 2021
International Journal of Advanced Computer Science and Applications, 2021
The importance of basic education is well noted in every country. Proper planning and utilization... more The importance of basic education is well noted in every country. Proper planning and utilization of resources at the basic level, helps in leveraging the success of education at all other levels of education in a country. Ghana is noted to be the country that spends higher in education than its West African counterparts. In Ghana, attempts made to plan by predicting and projecting expenditure as well as the available resources to manage basic education are not accurate enough to address the challenges of education in the country. With the issue of COVID 19 pandemic, more expenditure is realized in managing educational institutions as more resources are needed in observing the protocols to curtail the pandemic. This throws a serious challenge to the effective and efficient utilization of the limited resources in the country. In this paper, the data from the Ministry of Education is analysed using data mining techniques. This has helped to identify the inaccuracies in the data. Inaccurate population projection affects the Key Performance Indicators (KPIs) in education because population is a common denominator for educational indicators. A proposed expert system is to be developed to assist in managing the situation.
Sensors, 2021
Chaos theory and its extension into cryptography has generated significant applications in indust... more Chaos theory and its extension into cryptography has generated significant applications in industrial mixing, pulse width modulation and in electric compaction. Likewise, it has merited applications in authentication mechanisms for wireless power transfer systems. Wireless power transfer (WPT) via resonant inductive coupling mechanism enables the charging of electronic devices devoid of cords and wires. In practice, the key to certified charging requires the use of an authentication protocol between a transmitter (charger) and receiver (smartphone/some device). Via the protocol, a safe level and appropriate charging power can be harvested from a charger. Devoid of an efficient authentication protocol, a malicious charger may fry the circuit board of a receiver or cause a permanent damage to the device. In this regard, we first propose a chaos-based key exchange authentication protocol and analyze its robustness in terms of security and computational performance. Secondly, we theoret...
1,2,3 Department of Computer Science Kwame Nkrumah University of Science and Technology, Kumasi, ... more 1,2,3 Department of Computer Science Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract As developers endeavour to improve on solving world issues through software technology so are they interested in building robust applications with greater performance. PHP application maintenance becomes difficult and performance compromised, if the applications are developed as a core without frameworks. With the increasing number of frameworks, it is difficult to choose which framework has good performance for development. Two similar web applications were developed in two PHP frameworks (Laravel and CodeIgniter) and Jmeter used to test the performance (Load and Stress) of the applications. Assessment indicated that there is significant variation in performance between Laravel and CodeIgniter on a local setup regarding response time...
International Journal of Computer Applications, 2018
International Journal of Computer Network and Information Security, 2019
The decision to use either Cloud Computing (CC) applications or Traditional Information Technolog... more The decision to use either Cloud Computing (CC) applications or Traditional Information Technology Outsourcing (Traditional ITO) environments is a function of the security evaluations of these two options. Hackers are constantly nosing around websites and other computer networks for compromised computers that have some vulnerabilities to exploit them. Vulnerabilities in cloud computing and Traditional ITO environments are leading causes of recent data breaches. These breaches provide opportunities to hackers to attack and gain access to customer information such as credit cards and contact information, passwords, sending of malicious codes to website users or making users computer potential candidates of botnets and to hijack the sessions of authentic users to make unapproved purchases on their behalf. In this paper, security penetration tools have been employed to evaluate the security vulnerabilities of cloud-based solutions and Traditional ITO to discover possible vulnerabilities, their causes and mitigation strategies to securing web applications from the discovered vulnerabilities. Some web applications and a Traditional ITO network were ethically hacked to discover vulnerabilities in them. Analyses of the results obtained through the ZAP scan flagged Remote File Inclusion (RFI) alert were high priority alert. In all, RFI constitutes the most serious potential threat and it needs the fullest attention of CC service providers. Nmap disclosed opened ports in Traditional ITO Virtual Private Network which can make the server of the provider accessible to hackers leading to a considerable disclosure of information to unauthorized users.
International Journal of Computer Applications, May 17, 2018
International Journal of Computer Applications, 2020
International Journal of Computer Applications, 2020
Prior studies have established the security of resources outsourced for cloud storage heavily pre... more Prior studies have established the security of resources outsourced for cloud storage heavily preys on subscribers' minds. Existing cloud security frameworks classified as direct architectures (such as provided by DropBox, Box, Google, BackBlaze B2) and indirect architectures provided by the Cloud Access Security Brokers (CASB)/Security as a Service (SECaaS) providers have been found to be inadequate in assuring the cloud subscriber of the security of resources in terms data corruption, privacy, and performance in recovering data. This study employed an experimental lab setup using JAVA, SQL, and PHP to develop the Cloud Data Distribution Intermediary (CDDI) framework into software system dubbed Secure My Files (SMF). The SMF system provides users a choice of selecting one of four data priority levels (Low, Normal, Important, or Critical) at the time of uploading their data resource for cloud storage. The priority level selected determines: the uploading and downloading process the system uses, the amount of data that can be recovered in the event of data corruption, and the performance during data recovery. The security strength of the SMF system in relation to assuring of confidentiality, Integrity, and Availability of cloud data was found to be much 1 / 3
International Journal of Computer Applications, 2019
International Journal of Computer Applications, 2019
International Journal of Computer Applications, 2019
International Journal of Computer Applications, 2019
Analyzing the spatiotemporal distribution of tuberculosis (TB) is a very important way to underst... more Analyzing the spatiotemporal distribution of tuberculosis (TB) is a very important way to understand its epidemiology thereby helping to identify geographic regions at higher risk and to enable proper control and resource allocation. This study was undertaken to ascertain the spatiotemporal distribution of TB cases and treatment outcomes in the Birim Central Municipality (BCM) in the Eastern Region (E/R) of Ghana for the period 2012-2016 and to recommend appropriate preventive measures. In this retrospective study, the locations of the total of 268 TB cases identified from 2012-2016 were geocoded on the BCM digital maps. Spatial visualization using choropleth maps, network analysis, and service area analysis of ArcGIS10.2 was used to identify the geographic concentration of cases and the various treatment outcomes as well as proximity of patient community to health facility. A questionnaire was also used to collect primary data from TB patients diagnosed in year 2017. This data was analyzed using SPSS version 21. The study identified five main communities as hot spots of TB in the municipality with variations in other communities. It was also found that other non-spatial factors such as socioeconomic factors and stigmatization highly influence treatment outcome.
International Journal of Computer Applications, 2016
Communications on Applied Electronics, 2016
Universities in Ghana to which UMaT is no exception are under constant pressure to provide their ... more Universities in Ghana to which UMaT is no exception are under constant pressure to provide their communities with reliable internet access. As internet connectivity is increasingly becoming a strategic resource, having a robust campus network with good connectivity to the internet is no longer a luxury, but in actual sense now a basic necessity. UMaT has a robust LAN infrastructure which faces some challenges attributable to limited bandwidth of 45 MB, misuse of the bandwidth on low priority bandwidth hungry applications, and lack of effective user access control. This research aimed at studying the behavior patterns of network users and deploy an enhanced network access control using freeBSD pfSense open source software as the dedicated perimeter firewall with the introduction of squid, squidGuard, Squid Analysis Report Generator (SARG) and the setting up of an Active Directory server with user access policies to improve user access control and insulate the LAN from misuse and virus attacks.
International Journal of Computer Applications, 2016
Communications on Applied Electronics, 2016