Cryptographic algorithms are widely used for security purposes in embedded systems domain. Hardware implementations of cryptographic algorithms have a significant importance because of maximum security provision. There are various approaches for hardware implementation such as ASICs (Application Specific Integrated Circuits), GPPs (General Purpose Processors) and ASIPs (Application Specific Instruction Set Processors). ASICs provide higher throughput but at the same time they are application specific. GPPs are flexible but they provide limited throughput. There is a design space between throughput and flexibility in both the ASICs and GPPs i.e., to cover this space, ASIPs provide multiple design approaches such as crypto processors, crypto coprocessors and coarse-grain crypto arrays. In this paper we proposed a reconfigurable crypto processor design to compute scalar multiplication operation in elliptic curve cryptography over by using polynomial, basis. Lopez and Dahab scalar multiplication algorithm has been implemented for computation of scalar multiplication. The whole design is simulated and synthesized using Xilinx (ISE-13.4) and implemented on spartan-6 FPGA, XC6SLX16-CSG324 device. The experimental results show that at maximum of 12.5MHz frequency, the targeted device utilizes 1844 slices and 7464 LUTs.
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