| Summary: | 碩士 === 國立交通大學 === 資訊工程系所 === 93 === Providing security has become more and more urgent and necessary in embedded systems. If we want to support security in our embedded systems, some issues must be solved. We focus on processing gap and flexibility concerns. We target on the three commonly used cryptographic algorithms, AES, DES and RSA. In our thesis, we want to propose a hardware which solves the processing gap and switches flexibly between AES, DES, and RSA. Under the consideration of processing gap, we use space-time product as our performance metrics.
We first classify the operation of the three cryptographic algorithms into three classes. Then, we design modules for different operation classes respectively. The three modules are permutation-combination unit, computation unit and memory unit. The permutation-
combination unit is a custom design. The computation unit is consisted of processing elements and the memory unit is consisted of tile buffers. The different ratio of processing elements and tile buffers will lead to different results. We choose the most appropriate ratio. Finally, our proposed method will get better result than ASIC design.
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