73 books, 47.4M characters
Gutenberg-scale EAST constraint scan — 73 books, 47.4M characters, 3 cipher variants
In plain English: Gutenberg-scale EAST constraint scan — 73 books, 47.4M characters, 3 cipher variants — using a passage from a book or document as the encryption key. Every possible combination was tested (47.4 million configurations) — none produced a valid solution.
This approach is ruled out within the tested scope.
NOISE
Tier 2
How to read this record
- Verdict – NOISE (no better than random guessing), INTERESTING (slightly above random, almost certainly coincidence), SIGNAL (statistically unusual, warrants investigation), or FULL MATCH (all 24 known letters correct).
- Confidence Tier – Tier 1 = mathematical proof (permanent). Tier 2 = every possibility tested. Tier 3 = partially tested. Tier 4 = not yet tested.
- Configs Tested – How many different key/parameter combinations were tried.
- Best Score – How many of the 24 known plaintext letters the best attempt matched (out of 24).
- Keystream Consistency (Bean) – Whether the key values at different positions are mathematically consistent with each other.
- Scope Limitations – What this elimination does not rule out.
- Configs Tested
- 47,413,084
- Best Score
- 0 / 24 known letters matched · no better than random guessing (random guess would score: 0.0)
- Keystream Consistency (Bean)
-
FAIL
Checks whether the key values at different positions are mathematically consistent with each other. - Confidence
- Tier 2: Exhaustive search under stated assumptions. Does not eliminate multi-layer variants.
- Truth Tag
[INTERNAL RESULT]- Date Tested
- 2026-02-27
- Script
scripts/cfm/e_cfm_09_gutenberg_east_scan.py
Scope Limitations
This elimination does not rule out:
- Only tests 73 specific Gutenberg texts (English + German). Does not eliminate running key from untested texts or non-published sources.
Assumptions
- Running key from contiguous published text
- Vigenere/Beaufort/VB
- Identity transposition
Related Research Questions
Reproduce
PYTHONPATH=src python3 -u scripts/cfm/e_cfm_09_gutenberg_east_scan.pyRequires the kryptos repo, Python 3.11+, PYTHONPATH=src.
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