Paper 2025/1051 Original: eprint.iacr.org/2025/1051 ↗
Synergy: A Lightweight Block Cipher with Variable Bit Rotation Feistel Network
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.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2025-06-05: last updated
- 2025-06-05: published
- Short URL
- https://ia.cr/2025/1051
- License
- https://creativecommons.org/publicdomain/zero/1.0/
BibTeX
@misc{cryptoeprint:2025/1051,
author = {Anders Lindman},
title = {Synergy: A Lightweight Block Cipher with Variable Bit Rotation Feistel Network},
howpublished = {Cryptology {ePrint} Archive, Paper 2025/1051},
year = {2025},
url = {https://eprint.iacr.org/2025/1051}
}