Simulation and developed A5/3

The purpose of this paper is the simulation development of A5/3 algorithms used by GSM networks security, one of the elements of the GSM networks security is A5/3 algorithm. the simulation facilities of the MATLAB, specifically by the used SIMULINK environment. According to knowledge, this is the first time to develop a SIMULINK approach for realization the proposed developments of A5/3, and testing their validity of actual application in the real such field. the hardware realization is one of the great challenges facing the researchers working in the software field after finishing their implementation of their proposed software development., this act in such approach offering good background of hardware knowledge to the computer specialists working with this design of a developed key generator or cryptosystem, and offer great trust that the results of the developed algorithms can be applied without any obstacles.