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Title:
Synergy: A Lightweight Block Cipher with Variable Bit Rotation Feistel Network
Authors: Anders Lindman
Abstract:Synergy is a lightweight block cipher designed for resource-constrained environments such as IoT devices, embedded systems, and mobile applications. Built around a 16-round Feistel network, 8 independent pseudorandom number generators (PRNGs) ensure strong diffusion and confusion through the generation of per-block unique round keys. With a 1024-bit key and a 64-bit block size, Synergy mitigates vulnerabilities to ML-based cryptanalysis by using a large key size in combination with key- and data-dependent bit rotations, which reduce statistical biases and increase unpredictability. By utilizing 32-bit arithmetic for efficient processing, Synergy achieves high throughput, low latency, and low power consumption, providing performance and security for applications where both are critical.
ePrint: https://eprint.iacr.org/2025/1051
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