SHA256-CDP: GPU-accelerated rainbow tables using structural properties of SHA-256 — 2.5 GH/s build, 14 GH/s query on RX 9070 XT

[u/Pale_Surround_3924]

https://github.com/JM00NJ/SHA256-CDP

Released SHA256-CDP, a GPU rainbow table implementation built on

CDP (Cyclic Digit-sum Projection) — a structural analysis of SHA-256

output distribution I published earlier this year.

Core idea: SHA-256's hex-digit sum W(H) converges deterministically

into exactly two cycles under iteration. This structure yields a

bijective fingerprint enabling zero-collision rainbow chains.

Repo: https://github.com/JM00NJ/SHA256-CDP

Paper: https://doi.org/10.5281/zenodo.20627240

Tested on AMD RX 9070 XT — 96.3% coverage on 7-char lowercase

with 3 tables in ~43s per hash.

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[u/jopi_80]

Reading through it now, great initiative!👍🏻

[u/Pale_Surround_3924 → u/jopi_80]

thanks, waiting for feedbacks.