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Bug in MAC check for SPDZ-based protocols #324

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n1v0lg opened this issue Dec 10, 2018 · 1 comment

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Security Type: Bug

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n1v0lg commented Dec 10, 2018 •

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SPDZ, Mascot, and SPDZ2k require coin tossing to run every time a MAC check is executed.

Currently, we only run coin tossing once and re-use the resulting DRBG for all MAC checks. This is not secure and should be fixed for:

SPDZ
Mascot
SPDZ2k

n1v0lg self-assigned this

n1v0lg added Type: Bug Status: Pending labels

n1v0lg mentioned this issue

324 mac check spdz #343

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n1v0lg removed their assignment

jot2re added Security and removed Status: Pending labels

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jot2re commented Nov 22, 2022

Should be fixable by running coin-tossing each time there is a MAC check.

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