| Caesar cipher modulo 29 — all 29 shifts | ❌ |
Atbash modulo 29 — x → 28-x | ❌ |
| Affine substitution modulo 29 — all invertible multipliers and offsets | ❌ |
| Vigenère-like periodicity analysis modulo 29 — periods up to 100 | ❌ |
| Vigenère modulo 29 — periods 1–16, coordinate-ascent search | ❌ |
| Beaufort modulo 29 — periods 1–16, coordinate-ascent search | ❌ |
| Variant Beaufort modulo 29 — periods 1–16, coordinate-ascent search | ❌ |
| Gronsfeld cipher — periods 1–16 | ❌ |
| First-order affine recurrence modulo 29 | ❌ |
| Second-order linear recurrence modulo 29 | ❌ |
Arithmetic keystream — K[i] = a·i + b mod 29 | ❌ |
Quadratic keystream — K[i] = a·i² + b·i + c mod 29, 20,000 candidates | ❌ |
| Linear congruential generator keystream modulo 29 — 48,000+ candidates | ❌ |
| Fibonacci running key modulo 29 | ❌ |
| Prime-number running key modulo 29 | ❌ |
| Euler-totient running key modulo 29 | ❌ |
| Square-number running key modulo 29 | ❌ |
| Triangular-number running key modulo 29 | ❌ |
| Linear-position running key modulo 29 | ❌ |
| Quadratic-position running key modulo 29 | ❌ |
| Mathematical running keys reset at each word | ❌ |
| Running keys derived from already solved Liber Primus pages | ❌ |
| Ciphertext autokey modulo 29 — periods 1–16 | ❌ |
| Ciphertext autokey modulo 29 — seed lengths 1–6 | ❌ |
| Plaintext autokey modulo 29 — periods up to 16, beam size 500 | ❌ |
| Plaintext autokey modulo 29 — seed lengths 1–6, beam size 100 | ❌ |
| Recursive linear autokey modulo 29 — 1,000 completed candidates | ❌ |
| Full-text reversal | ❌ |
| Per-word reversal | ❌ |
| Word-order reversal | ❌ |
| Rail Fence transposition — tested rail counts | ❌ |
| Columnar transposition — widths up to 20, natural and reversed column order | ❌ |
| Fixed-size block reversal | ❌ |
| Canonical small-block permutations | ❌ |
| Constant XOR masks — masks 0–31 followed by modulo 29 | ❌ |
Page-dependent modular shifts — K = page·a + seed mod 29 | ❌ |
| Playfair-like fractionation on a shifted 6×5 grid | ❌ |
| Bifid-like fractionation on a shifted 6×5 grid — periods up to 20 | ❌ |
