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Today β€” December 19th 2025/r/netsec - Information Security News & Discussion

[Research] Geometric analysis of SHA-256: Finding 68% bit-match pairs through dimensional transformation

New preprint exploring unconventional cryptanalysis:

β€’ Framework: β€œInverse Dimensionalization”
β€’ Target: SHA-256 structural analysis
β€’ Result: 174/256 matching bits (M₁ = 88514, Mβ‚‚ = 88551)
β€’ Time: 3.8 seconds
β€’ NOT a collision β€” but statistically anomalous

Paper + reproducible code: https://doi.org/10.17605/OSF.IO/6YRW8
Full paper with math and code: https://doi.org/10.17605/OSF.IO/6YRW8
Paper: https://osf.io/6yrw8/files/wj9ze
Code: https://osf.io/6yrw8/files/zy8ck
Verification code: https://osf.io/6yrw8/files/pqne7

Device specifications used to find the 174/256-bit match in 3.8 seconds:
β€’ Google Colab Free CPU
β€’ Intel Xeon
β€’ Clock speed: between 2.20 GHz and 2.30 GHz
β€’ Cores (vCPUs): 2 virtual cores
β€’ RAM: 12 GB

Security implications discussion welcome.

submitted by /u/No_Arachnid_5563
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