Browsing by Author "Jekese, G"

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Impact of Object Oriented Design Patterns on Software Development
(International Journal of Scientific & Engineering Research, 2015-02-02) Subburaj, R.; Jekese, G; Hwata, C
—Software design patterns are a bonanza for building large Object Oriented (OO) software systems. They provide well-tested and proven solutions to recurring problems that developers address. There are several benefits of using patterns. They can speed up the software development process. Design patterns consolidate learning with an aim to make it easier for designers to use well-known and successful designs developed from expert experience. At the same time software design patterns are too abstract and remain an art that has to be mastered over time with experience. This paper seeks to evaluate the advantages and disadvantages of design patterns.
Securing patient data in the cloud using Attribute Based Encryption
(International Journal of Scientific & Engineering Research, 2015-03-01) Subburaj, R; Hwata, C; Jekese, G
Cloud computing has attracted attention worldwide in all industries, including the medical field leading to the rise of electronic healthcare systems. Although it has brought about an improvement in the provision of healthcare in terms of information management, it also poses a lot of security and privacy concerns to the patients. This is due to the fact that personal and highly sensitive data is outsourced to a third party (Cloud Service Provider) for processing and storage. This paper seeks to improve security of cloud-based patient data in healthcare organizations by employing a Ciphertext Policy Attribute Based Encryption (CP-ABE) scheme. The proposed scheme provides data confidentiality and allows the patient to control who accesses her personal health data by encrypting it under a specified access policy alongside with her key. It also provides collusion-resistance, flexible and immediate revocation of users who are no longer allowed to access a patient’s data.
Virtual Firewall Security on Virtual Machines in Cloud Environment
(International Journal of Scientific & Engineering Research, 2015-02-01) Jekese, G; Subburaj, R; Hwata, C
Virtualization is revolutionizing how information technology resources and services are used and managed and has led to an explosive growth in the cloud computing industry, illustrated by Google’s Cloud Platform and Amazon’s Elastic Cloud. It brings unique security problems such as virtual traffic, denial of service and intrusion, resulting in penetration of virtual machines, which is disastrous for the enterprise, the user and the cloud provider. Virtual traffic between virtual machines may never leave the physical host hardware; making traditional physical firewalls hopeless to monitor and secure it. This paper proposes a virtual firewall which allows managing the network security of the virtual infrastructure per-virtual machine basis, defining network traffic rules, and hardening the security of the virtual environment. A private cloud is designed using open source solutions and to manage the firewall rules, we implement a Tree-Rule firewall technique which filters packets in a tree-like way based on their attributes such as IP address and protocols. The speed of filtering and processing packets on virtual firewall is highly improved to avoid overload of the firewall in the particular case. It permits to log and analyze network traffic logs for each of the monitored virtual machines. The virtual firewall will provide the power to control the bandwidth utilization of each virtual machine in the infrastructure, preventing overutilization and denial of service to critical applications.