Multi Layer

Combined approaches that stack multiple encryption steps. For example, replacing letters first, then scrambling their order. Includes null extraction, cascaded layers, and joint optimization.

What we tested: Structured multi-layer combinations are one of the main remaining search areas for K4. We have already tested a large bounded slice of that space, including many structured rearrangement methods paired with keyed substitution, and found no signal. What remains open are combinations outside the registered layer families, non-standard procedures, or source/key models we cannot yet bound cleanly.

48 eliminations recorded.

Title	Configs	Best	Verdict	Tier
Running key from known reference texts + columnar transposition 15+ known reference texts + columnar transposition sweeps — using a combined approach: scramble the letter order AND replace each letter. Every possib…	52,000,000	7/24 (0.0)	NOISE	Tier 2
Columnar transposition × periodic substitution on 73-char column mask extract Meet-in-the-Middle attack on 73-char column mask extract: columnar transposition (w7-9 exhaustive, 408,240 permutations) × periodic sub (p1-13) × Vig/…	31,800,000	18/24 (0.0)	NOISE	Tier 2
Transposition-guided running key fragment scoring (28M Monte Carlo, 28 cores) Transposition-guided running key fragment scoring — optimal assignment via Monte Carlo (28M samples, 28 cores) — using a combined approach: scramble t…	28,000,000	0/24 (0.0)	NOISE	Tier 3
Mitm Mono Transposition Tested a combined approach: scramble the letter order AND replace each letter. 4.2 million key/parameter combinations were tested.	4,209,541	0/24 (0.0)	NOISE	N/A
Mitm Periodic Transposition Tested a combined approach: scramble the letter order AND replace each letter. 4.2 million key/parameter combinations were tested.	4,209,541	0/24 (0.0)	NOISE	N/A
Mitm Autokey Transposition Tested a combined approach: scramble the letter order AND replace each letter. 4.2 million key/parameter combinations were tested.	4,207,963	0/24 (0.0)	NOISE	N/A
Blitz Strip Cipher V2 Tested a combined approach: scramble the letter order AND replace each letter. 3.6 million key/parameter combinations were tested.	3,608,555	0/24 (0.0)	NOISE	N/A
Targeted search for transpositions resolving homophonic contradictions Tested a method where each letter can be represented by multiple different symbols. 1.3 million key/parameter combinations were tested.	1,282,433	0/24 (0.0)	NOISE	N/A
Blitz Strip Cipher Tested a combined approach: scramble the letter order AND replace each letter. 118 thousand key/parameter combinations were tested.	118,317	0/24 (0.0)	NOISE	N/A
Monoalphabetic + transposition + running key degrees of freedom analysis Tested a combined approach: scramble the letter order AND replace each letter. 100 thousand key/parameter combinations were tested.	100,000	0/24 (0.0)	NOISE	Tier 3
Partitioned encryption — two systems on two message parts. All 24/24 hits are at period ≥13 (underdetermination false positives) and ALL fail Bean constraints. Partitioned encryption — two systems on two message parts — using multiple encryption steps applied one after another. 75 thousand key/parameter combi…	75,168	24/24 (0.0)	NOISE	N/A
Four 6x4 grids stacked with independent shifts. Palette overlap = null. DEFECTOR/ABSCISSA AZ_beau + col6/col7. Four 6x4 grids stacked with independent shifts — using the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to …	27,848	0/24 (0.0)	NOISE	N/A
Inclinare Stacked Null Mask Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message. 4 thousand key/parame…	4,313	0/24 (0.0)	ELIMINATED	N/A
Null cipher / skip cipher / steganographic extraction patterns On K4 CT — using the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message. Every possi…	2,500	0/24 (0.0)	NOISE	Tier 2
Novel multi-stage decryption pipelines Tested multiple encryption steps applied one after another. 2 thousand key/parameter combinations were tested.	2,462	0/24 (0.0)	NOISE	N/A
Native 28×31 grid reading orders + periodic substitution on 73-char extract Tested 10+ native grid reading orders (column-by-column L→R/R→L, serpentine columns/rows, diagonal TLBR/TRBL, spiral CW, paired mirror columns, row-re…	2,262	22/24 (0.0)	NOISE	Tier 2
Palette Exhaustive Null Mask Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message. 8 key/parameter combi…	8	0/24 (0.0)	NOISE	N/A
Blitz CSP Structural Tested backward reasoning from known constraints to narrow possibilities.	N/A	0/24 (0.0)	NOISE	N/A
S 20 Constraint Propagation Tested backward reasoning from known constraints to narrow possibilities.	N/A	0/24 (0.0)	NOISE	N/A
Widths 5-11, 3 variants, 9 corpora Egypt corpus x columnar transposition sweep (widths 5-11, 3 variants, 9 corpora) — using a combined approach: scramble the letter order AND replace ea…	N/A	0/24 (0.0)	NOISE	Tier 2
Stego Oracle Tested a combined approach: scramble the letter order AND replace each letter.	N/A	0/24 (0.0)	NOISE	N/A
Two Layer Stego Cipher Tested a combined approach: scramble the letter order AND replace each letter.	N/A	0/24 (0.0)	NOISE	N/A
Brute-force 7 remaining null positions (consensus 17 fixed) Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Bruteforce 7remaining Task3 Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Bruteforce 7remaining Tasks12 Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Col8 Null Mask Test Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Extended brute force pos 34-41 with AP + restricted alphabet filters Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
K4 in 4x24 grid (matching K3 chart rows), wheel rotation separates stego Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Morse Binary Null Mask Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
S Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Exhaustive Palette Mask Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Model Invariance Sweep Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
NDYAHR Corrected Neighbor Deletion + LAYER TWO Investigation Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
NDYAHR Neighbor Deletion Layer Two Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
NDYAHR letters in 28x31 grid are directional pointers to neighbors for deletion Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Phase 1: Local constant-difference constraint census at all 17 null positions Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Null Mask Diversity Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Null Mask Provenance Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Palette Controls Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Running Key Palette Filter Tested the hypothesis that some letters in the carved text are meaningless filler (nulls) inserted to disguise the real message.	N/A	0/24 (0.0)	NOISE	N/A
Null mask crib preservation analysis (not a decryption test) Measures whether crib positions are preserved under varying null masks — using the hypothesis that some letters in the carved text are meaningless fil…	N/A	0/24 (0.0)	NOISE	N/A
Compose Tested multiple encryption steps applied one after another.	N/A	0/24 (0.0)	NOISE	N/A
Team Layered Verify Tested multiple encryption steps applied one after another.	N/A	0/24 (0.0)	NOISE	N/A
Team Mono Trans SA Tested multiple encryption steps applied one after another.	N/A	0/24 (0.0)	NOISE	N/A
K4 frequency distribution analysis and homophonic solver Tested a method where each letter can be represented by multiple different symbols.	N/A	0/24 (0.0)	NOISE	N/A
Systematic search for transpositions resolving all 9 homophonic contradictions Tested a method where each letter can be represented by multiple different symbols.	N/A	0/24 (0.0)	NOISE	N/A
Homophonic + transposition contradiction resolution Tested a method where each letter can be represented by multiple different symbols.	N/A	0/24 (0.0)	NOISE	N/A
Nomenclator + superencipherment model analysis Tested a method where each letter can be represented by multiple different symbols.	N/A	0/24 (0.0)	NOISE	N/A