Bug in MAC check for SPDZ-based protocols
Opened this issue · 1 comments
n1v0lg commented
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
jot2re commented
Should be fixable by running coin-tossing each time there is a MAC check.