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tHyENA: Making HyENA Even Smaller

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conference contribution
posted on 2023-11-29, 18:18 authored by Avik Chakraborti, Nilanjan Datta, Ashwin Jha, Cuauhtemoc Mancillas-Lopez, Mridul Nandi
This paper proposes a lightweight short-tweak tweakable blockcipher (tBC) based authenticated encryption (AE) scheme tHyENA, a tweakable variant of the high profile NIST LWC competition submission HyENA. tHyENA is structurally similar to HyENA, however, proper usage of short-tweaks for the purpose of domain separation, makes the design much simpler compact. We know that HyENA already achieves a very small hardware footprint, and tHyENA further optimizes it. To realize our claim, we provide NIST API compliant hardware implementation details and benchmark for tHyENA against HyENA and several other well-known sequential feedback-based designs. The implementation results depict that when instantiated with the tBC TweGIFT, tHyENA achieves an extremely low hardware footprint - consuming only around 680 LUTs and 260 slices while maintaining the full rate and the almost birthday bound security. To the best of our knowledge, this figure is significantly better than all the known implementation results of other lightweight ciphers with sequential structures.


Preferred Citation

Avik Chakraborti, Nilanjan Datta, Ashwin Jha, Cuauhtemoc Mancillas-Lopez and Mridul Nandi. tHyENA: Making HyENA Even Smaller. In: International Conference on Cryptology in India (Indocrypt). 2021.

Primary Research Area

  • Algorithmic Foundations and Cryptography

Name of Conference

International Conference on Cryptology in India (Indocrypt)

Legacy Posted Date


Open Access Type

  • Unknown


@inproceedings{cispa_all_3579, title = "tHyENA: Making HyENA Even Smaller", author = "Chakraborti, Avik and Datta, Nilanjan and Jha, Ashwin and Mancillas-Lopez, Cuauhtemoc and Nandi, Mridul", booktitle="{International Conference on Cryptology in India (Indocrypt)}", year="2021", }

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