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Tight Security Bound of 2k-LightMAC Plus
Sept. 24, 2023, 6:30 a.m. |
IACR News www.iacr.org
ePrint Report: Tight Security Bound of 2k-LightMAC Plus
Nilanjan Datta, Avijit Dutta, Samir Kundu
In ASIACRYPT'17, Naito proposed a beyond-birthday-bound variant of the LightMAC construction, called LightMAC_Plus, which is built on three independently keyed $n$-bit block ciphers, and showed that the construction achieves $2n/3$-bits PRF security. Later, Kim et al. claimed (without giving any formal proof) its security bound to $2^{3n/4}$. In FSE'18, Datta et al. have proposed a two-keyed variant of the LightMAC_Plus construction, called 2k-LightMAC_Plus, which is built …
asiacrypt beyond bits block called ciphers construction eprint report kim report security
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