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Context Discovery and Commitment Attacks: How to Break CCM, EAX, SIV, and More
April 12, 2023, 12:06 p.m. |
IACR News www.iacr.org
ePrint Report: Context Discovery and Commitment Attacks: How to Break CCM, EAX, SIV, and More
Sanketh Menda, Julia Len, Paul Grubbs, Thomas Ristenpart
A line of recent work has highlighted the importance of context commitment security, which asks that authenticated encryption with associated data (AEAD) schemes will not decrypt the same adversarially-chosen ciphertext under two different, adversarially-chosen contexts (secret key, nonce, and associated data). Despite a spate of recent attacks, many open questions remain around context commitment; most obviously nothing …
aead attacks ciphertext context data decrypt discovery encryption eprint report key nonce paul questions report secret secret key security thomas under work
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