Hens and Roosters crypto/web chall from UMassCTF 2026#81
Open
FlyN-Nick wants to merge 6 commits intoCUCTF:mainfrom
Open
Hens and Roosters crypto/web chall from UMassCTF 2026#81FlyN-Nick wants to merge 6 commits intoCUCTF:mainfrom
FlyN-Nick wants to merge 6 commits intoCUCTF:mainfrom
Conversation
IsaacTrost
approved these changes
Apr 21, 2026
Contributor
IsaacTrost
left a comment
IsaacTrost
left a comment
There was a problem hiding this comment.
Looks good, one minor fixup and I think it is good to merge. Also fix your inline latex.
|
|
||
| where each target $t_i \in \{0, 1\}$ is a bit extracted from the message hash (via SHAKE-128). | ||
|
|
||
| **The weak parameterization.** In this implementation, the public key matrices are constructed such that all entries $(P_i)_{jk} \in \mathbb{F}_2 \subseteq \mathbb{F}_{2^7}$ — i.e., every coefficient is either 0 or 1. This is the root cause of the vulnerability. |
Contributor
There was a problem hiding this comment.
Explain this a bit, why does this hold. Maybe point to the code
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
No description provided.