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Recovering the Key from the Internal State of Grain-128AEAD

Published

Author(s)

Donghoon Chang, Meltem Sonmez Turan

Abstract

Grain-128AEAD is one of the second-round candidates of the NIST lightweight cryptography standardization process. There is an existing body of third-party analysis on the earlier versions of the Grain family that provide insights on the security of Grain-128AEAD. Different from the earlier versions, Grain-128AEAD reintroduces the key into the internal state during the initialization. The designers claim that internal state recovery no longer results in key recovery, due to this change. In this paper, we analyze this claim under different scenarios.
Citation
Cryptology ePrint Archive
Issue
2021

Keywords

Grain-128AEAD, Lightweight cryptography, key recovery

Citation

Chang, D. and Sonmez, M. (2021), Recovering the Key from the Internal State of Grain-128AEAD, Cryptology ePrint Archive, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932091, https://eprint.iacr.org/2021/439 (Accessed September 22, 2021)
Created April 3, 2021, Updated April 7, 2021