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The Security of ChaCha20-Poly1305 in the Multi-user Setting
Jan. 26, 2023, 4:30 p.m. |
IACR News www.iacr.org
ePrint Report: The Security of ChaCha20-Poly1305 in the Multi-user Setting
Jean Paul Degabriele, Jérôme Govinden, Felix Günther, Kenneth G. Paterson
The ChaCha20-Poly1305 AEAD scheme is being increasingly widely deployed in practice. Practitioners need proven security bounds in order to set data limits and rekeying intervals for the scheme. But the formal security analysis of ChaCha20-Poly1305 currently lags behind that of AES-GCM. The only extant analysis (Procter, 2014) contains a flaw and is only for the single-user setting. We rectify this …
aead aes analysis chacha20 data eprint report flaw order paul practice report security security analysis
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