Abstract:
Shared computing typically involves distributing the processing of a single program among two or more systems over a communication network. Such environment should be secured and trusted. The current process of employment, both in the public and private sectors is characterized by subjective, untrusted and insecure employment process. Thus, there is a need to re-strategize employment processing in such a way that the aforementioned are reduced.
Consequently, this thesis presents a model for a secured Shared Processing System. A public-key cryptographic scheme, ElGamal is adopted in the model to enhance trust and security. The System is deployed on four workstations distributed System in which one stands as trusted while the others remain untrusted. Information sent to and from the trusted System is secured using the ElGamal scheme. The process simplifies the Diffie Hellman key exchange algorithm by the introduction of a random exponent k generated and published prior to the encryption procedure. At the receiver’s end, the random exponent k is the replacement for the private exponent of the entity which is necessary for decryption procedure. Furthermore, the ElGamal signature ensures forgery prevention; the System enhances faster encryption and decryption processes because the System is not affected by Network delay. Also, the information and data being sent are secured. The System was implemented using Ondo State Civil Service as a case study. It was observed that the Ciphertext of the proposed System is dynamically generated when compared with an attribute-based signature system.
