Hens and Roosters crypto/web chall from UMassCTF 2026#81
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IsaacTrost
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Looks good, one minor fixup and I think it is good to merge. Also fix your inline latex.
Escape underscores in LaTeX so that GitHub doesn't mistake them for italics.
+ update the stimate of how long it takes for the slow-path to run
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Fixed the inline LaTeX so that it renders properly on GitHub, and added a more thorough explanation/justification of the weak parameterization. The source code of the challenge is now available online, so I was able to verify my claims against the private key, however I did not detail that in the writeup because I felt like the writeup should only address artifacts that were provided to competitors. This should be ready to merge now @IsaacTrost @mmstoic. |
…aping Expand the weak parameterization section to explain why P_i entries lie in F_2, with a verification snippet and printed matrix corner from the real keys. Also remove the incorrect "symmetric" descriptor (pk[0] != pk[0].T) and fix two unescaped LaTeX underscores.
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- Add missing uid initialization (GET /) to Exploitation step 1 - Fix TOCTOU stud count: race lands at 8, not 7 - Correct gf2_7_square description: b is the multiplier, a is the multiplicand
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