PERFORMANCE ANALYSIS OF DES AND RSA SUITABILITY FOR DIFFERENT SYSTEM APPLICATIONS

ABSTRACT

This work is based on performance Analysis of DES and RSA suitability for different system applications. The rationale behind the work was to find out how suitable DES (Data Encryption Standard) and RSA (Rivest, Shamir and Adlemen) are for different application systems under different systems requirements. In order to achieve these objectives, an application that implements DES and RSA was developed using object oriented analysis and design (OOAD) approach, and  was implemented in java programming language. The application was used to encrypt and decrypt different file sizes for DES and RSA. The Encryption Execution Time (EET) and Decryption Execution Time (DET) were taken, and throughput was calculated. Also, other parameters like security strength and memory consumption of the two algorithms were gotten from the works reviewed. The work went further to make a comparison based on EET and DET of DES and RSA using generated data. Also, power consumption, memory usage, and security strength of the two algorithms were compared. The result of the analysis shows that DES is faster than RSA, consumes low power than RSA, takes less memory than RSA but weaker in security. While RSA is stronger in security than DES, slower compare to DES, and consumes more power and memory than DES. Therefore DES was judged suitable for applications where speed takes higher priority than security and other requirement while RSA is more suitable for applications where system security takes higher priority than other requirements.

DESIGN AND IMPLEMENTATION OF A DIGITAL LIBRARY SYSTEM

ABSTRACT

Libraries have been an important part of educational and information sector of any school.  The success of any library largely depends on proper management.

Several libraries have suffered failure as a result of inadequate management and incapacitations in handling sensitive information as regards members of the library.

This research therefore, aimed at developing a digital library system, which will help direct and position library to meets its ever increasing demands.

In the course of the development of this new system, the current system was analytically and critically studied or assessed and thus the identified strengths and weaknesses were highlighted and a new system was designed for the weakness.

The present system was analyzed using a standard procedure recognized worldwide for such purpose and this is called Structured System Analysis and Design Methodology (SSADM).  The visual basic 6.0 programming language was used to code the program modules developed for the system using some computer aided design tools.

Online examination system that can mark both objective and essay-type questions

Online examination systems are replacing traditional methods of writing examinations. A lot of progress has been made in administering objective examinations online with a high rate of success. However, research is on-going as to the administration and grading of essay-type (subjective) examination. This is because computers do not have the ability to reason like humans in grading essay-type examinations with instant feedback. In most essay-type examination systems, the answers from the students need to be submitted to the examiners for grading which often takes time. In this study, we apply a keyword match approach using SQL MATCH AGAINST syntax to grade essay-type examination questions. The system also handles the grading of objective examinations. The proposed system offers many advantages over the traditional method of writing and grading exams including fast grading and instant result feedback to candidates