SAILOR: A Scalable and Energy-Efficient Ultra-Lightweight RISC-V for IoT Security
Abstract
Recently, RISC-V has contributed to the development of IoT devices, requiring architectures that balance energy efficiency, compact area, and integrated security. However, most recent RISC-V cores for IoT prioritize either area footprint or energy efficiency, while adding cryptographic support further compromises compactness. As a result, truly integrated architectures that simultaneously optimize efficiency and security remain largely unexplored, leaving constrained IoT environments vulnerable to performance and security trade-offs. In this paper, we introduce SAILOR, an energy-efficient and scalable ultra-lightweight RISC-V core family for cryptographic applications in IoT. Our design is modular and spans 1-, 2-, 4-, 8-, 16-, and 32-bit serialized execution data-paths, prioritizing minimal area. This modular design and adaptable data-path minimizes the overhead of integrating RISC-V cryptography extensions, achieving low hardware cost while significantly improving energy efficiency. We validate our design approach through a comprehensive analysis of area, energy, and efficiency trade-offs. The results surpass state-of-the-art solutions in both performance and energy efficiency by up to 13x and reduce area by up to 59 %, demonstrating that lightweight cryptographic features can be added without prohibitive overhead, and that energy- or area-efficient designs need not compromise performance.
Cite
@article{arxiv.2602.24166,
title = {SAILOR: A Scalable and Energy-Efficient Ultra-Lightweight RISC-V for IoT Security},
author = {Christian Ewert and Tim Hardow and Melf Fritsch and Leon Dietrich and Henrik Strunck and Rainer Buchty and Mladen Berekovic and Saleh Mulhem},
journal= {arXiv preprint arXiv:2602.24166},
year = {2026}
}