A master's dissertation was discussed in the Technical College of Electrical Engineering, Middle Technical University on digital signature algorithm processor DSAP, which based on field programmable gate arrays FPGA by postgraduate student, Mrs. Atyaf Hamid. The study reviewed developing of communications and information technology systems, where the information that is transmitted over networks has become more valuable and this leads to attract the attention of attackers and researchers to focus in this field. The study highlighted designing a new multi-key algorithm (RSA) (MK-RSA) to be used for both the confidentiality of the message and the source of the message, which differs from previous designs because it relies on a multiple-key strategy to ensure the security of communication systems. The study demonstrated that the RSA algorithm adds many applications such as encryption / decryption, digital signature and key exchange to achieve the confidentiality of the message and verify its source via using the double RSA algorithm in both the source and the receiver.