Comments about some attacks for pairing-based cryptography

cfrg / draft-irtf-cfrg-pairing-friendly-curves

https://datatracker.ietf.org/doc/draft-irtf-cfrg-pairing-friendly-curves/

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Comments about some attacks for pairing-based cryptography #57

Closed yumi-sakemi closed 4 years ago

yumi-sakemi commented 4 years ago

Comments from Sean Bowe:

it's worth considering Cheon's attack and twist security -- not sure if the paper you got these parameters from did that.

yumi-sakemi commented 4 years ago

Thanks to his comments, I noticed that the description of the Cheon's attack was missing from the security consideration in our draft. The recommended curves are affected by the Cheon's attack, so I added it to the security consideration.

Regarding the twist security, in the case of pairing, since the twisted curve itself is used as a G_2, the security of DLP in G_2 is also considered.

Tsune3110 commented 4 years ago

OK!

This is a cross-check as a co-author.

yumi-sakemi commented 4 years ago

Thank you for your checking, Tsunekazu! I'll close this issue.