Intel® AVX-512 - Fast Modular Multiplication Technique Technology Guide
Last Updated: Mar 26, 2024
The most commonly utilized public key cryptosystems (RSA, ECDSA, etc.) in the pre-quantum era are constructed over finite fields. For these finite fields, the most important and time-consuming operation is the modular multiplication of integers under large moduli. Efficient implementations of multi-precision arithmetic are very critical for the performance of these cryptosystems. Intel® Advanced Vector Extensions 512 (Intel® AVX-512) based Integer Fused Multiply Add Instructions (IFMA) are utilized for multi-buffer high-throughput software implementations of RSA. This paper presents a novel Modular Multiplication algorithm that increases the throughput of multi-buffer IFMA implementations of RSA operations in the range of 10%.
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