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Light-OCB: Parallel Lightweight Authenticated Cipher with Full Security

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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 authenticated encryption (AE) scheme, called Light-OCB, which can be viewed as a lighter variant of the CAESAR winner OCB as well as a faster variant of the high profile NIST LWC competition submission LOCUS-AEAD. Light-OCB is structurally similar to LOCUS-AEAD and uses a nonce-based derived key that provides optimal security, and short-tweak tweakable blockcipher (tBC) for efficient domain separation. Light-OCB improves over LOCUS-AEAD by reducing the number of primitive calls, and thereby significantly optimizing the throughput. To establish our claim, we provide FPGA hardware implementation details and benchmark for Light-OCB against LOCUS-AEAD and several other well-known AEs. The implementation results depict that, when instantiated with the tBC TweGIFT64, Light-OCB achieves an extremely low hardware footprint - consuming only around 1128 LUTs and 307 slices (significantly lower than that for LOCUS-AEAD) while maintaining a throughput of 880 Mbps, which is almost twice that of LOCUS-AEAD. To the best of our knowledge, this figure is significantly better than all the known implementation results of other lightweight ciphers with parallel structures.

History

Preferred Citation

Avik Chakraborti, Nilanjan Datta, Ashwin Jha, Cuauhtemoc Mancillas-Lopez and Mridul Nandi. Light-OCB: Parallel Lightweight Authenticated Cipher with Full Security. In: International Conference on Security, Privacy and Applied Cryptographic Engineering (SPACE). 2021.

Primary Research Area

  • Algorithmic Foundations and Cryptography

Name of Conference

International Conference on Security, Privacy and Applied Cryptographic Engineering (SPACE)

Legacy Posted Date

2022-03-02

Open Access Type

  • Unknown

BibTeX

@inproceedings{cispa_all_3581, title = "Light-OCB: Parallel Lightweight Authenticated Cipher with Full Security", author = "Chakraborti, Avik and Datta, Nilanjan and Jha, Ashwin and Mancillas-Lopez, Cuauhtemoc and Nandi, Mridul", booktitle="{International Conference on Security, Privacy and Applied Cryptographic Engineering (SPACE)}", year="2021", }

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