Abstract:
A secret code based communication system over a local network is the subject system. This is a
communication system that relies on the algorithms to encrypt and decrypt that is able to work
with any type of message and files exchanged amongst computers connected on a local area
network. The message and files are encrypted using secret keys that are selected by the sender
and this secret key is made known via SMS to the receiver on his/her phone number. At the
receiving end, the message is retrieved upon entering the correct key similar to the one used to
encrypt. In gathering requirements, consultation, interviews and document review concerning the
existing security systems and their weakness were used. It was from the analysis of the gathered
information that the development of secret code based communication system over a local
network system kicked off. I designed the system in visual basic studio and wrote the code in C#
which provided me with the basic picture on how the system would work and be integrated from
it's constituent subsystems. The subparts of the system were tested prior to the system testing after which they were integrated. The functionality of the system was under the control of the algorithm/code that was written in C#. The system was finally subjected to system testing to verify and validate it is working.
