AXI Hardware Accelerator for McEliece on FPGA Embedded Systems
AXI Hardware Accelerator for McEliece on FPGA Embedded Systems
Abstract:
This article presents a McEliece hardware accelerator designed to be attached to an AXI infrastructure, addressing the efficient implementation of a flexible post-quantum cryptoprocessor on FPGA-based embedded systems. The complexity of the arithmetic circuits, combined with the adaptability to different applications by configurable parameters and run-time reprogramming, presents challenging issues for integrating the accelerator into these systems. The architecture of the accelerator is based on an application-specific instruction processor, which executes a set of constant-time instructions from an internal register file and memories. The role of the embedded processor is reduced to the initial writing of the instruction memory of the accelerator, the launching of the required set of instructions and configuring the Direct Memory Access controller to retrieve and store data from external memory. The run-time programming of the accelerator provides high flexibility in applications that requires post-quantum cryptography. A set of configurable parameters permits to adapt the security level of the McEliece encryption-decryption and the area-performance tradeoff imposed by the target device. Thus, the accelerator can be implemented from low-cost to high-end FPGAs by configuring the data-width of DMA buses or the parallelism level of the Galois-Field adder-multiplier. Experimental results show the accelerator is suited for implementing efficiently the highest security parameters of the Classic McEliece, achieving a McEliece decryption speed-up from x370 to x556 and occupying a small number of resources on a low-cost FPGA. In high-end FPGAs, the accelerator can be configured using higher security parameters not achieved in previous related cryptoprocessors, providing even higher accelerations.
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AXI Hardware Accelerator for McEliece on FPGA Embedded Systems
