A Scalable Design of RSA Crypto-coprocessor

A scalable design of RSA crypto-coprocessor is presented in this paper, which supports variable keys up to 4096-bits. By analyzing and improving the modified multiple-word Montgomery multiplication algorithm, its pipeline architecture is optimized and critical path is greatly shortened. Meanwhile, its performance is much higher compared with previous work. Therefore, the proposed design is very suitable to the low-cost and high-performance RSA cryptosystem and can be easily implemented in VLSI technology