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SHA-256: structure and reduced-round models

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Work on the message schedule and compression models with fewer rounds. No results published here yet.

Authors
Jordi Gartner
Research status
Work in progress
Published
Version
2

I'm looking at structure in the SHA-256 message schedule and models of its compression function with fewer rounds.

There are no published manuscripts, datasets or reproduction packages for this project here yet. This page makes no claim of a practical weakness in SHA-256.

Any result I publish will state the model, round count, assumptions and exact claim. Results for fewer rounds apply to that model; they do not automatically apply to full SHA-256.

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I use AI for research, code, drafts, translations and internal checks. The methods page explains what those checks cover.

Related releases

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Version history

VersionPublishedChange note
v4Updated publication information.
v3Clarified the project scope and linked its GitHub overview in English, German and Chinese.
v2Wording revised for clarity; comment guidance updated where relevant.
v1Initial editorial overview; no research files released.

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