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Formal Security Definition of Metadata-Private Messaging
Sept. 5, 2022, 6:06 p.m. |
IACR News www.iacr.org
ePrint Report: Formal Security Definition of Metadata-Private Messaging
Shengtong Zhang, Arvid Lunnemark, Sualeh Asif
We present a novel, complete definition of metadata-private messaging (MPM) and show that our definition is achievable and non-trivially more general than previous attempts that we are aware of. Our main contributions are:
1) We describe a vulnerability in existing MPM implementations through a variation of the compromised-friend (CF) attack proposed by Angel et al. Our attack can compromise the exact metadata of any conversations between …
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