Data security is in demand in everyday life of digital world, while digital data's can be reproduced much easily. To accomplish the maximum security required a parallel processing; the user reconfigurable cryptographic RISC microprocessor is proposed in the authors' manuscript. Rather than protecting the data using tools and external codes, a microprocessor is particularly designed in their project to offer maximum digital security. Cryptographic processor classified either as asymmetric cryptography or asymmetric cryptography processor. Asymmetric cryptography has the improvement of reception security but has the limitation of high resource utilization.