New posting: May.12, 2002 - Code

Project Skyscraper
68

Explainer:

It is a monoalphabetic position based cipher using the key MINDFAGEBJRLHCVPQSKYUWOXTZ:

  1. For each ciphertext letter, use its A=0…Z=25 value as an index into the
    key text. The key letter at that position is the plaintext.
Position:  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Key text:  M  I  N  D  F  A  G  E  B  J  R  L  H  C  V  P  Q  S  K  Y  U  W  O  X  T  Z
Plain:     A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Walkthrough

Cipher:   L  H  W  C  F  K  D     D  H     O  B  C  N  B
Value:   11  7 22  2  5 10  3     3  7    14  1  2 13  1
          ↓  ↓  ↓  ↓  ↓  ↓  ↓     ↓  ↓     ↓  ↓  ↓  ↓  ↓
Key[pos]: L  E  O  N  A  R  D     D  E     V  I  N  C  I
Plain:    L  E  O  N  A  R  D     D  E     V  I  N  C  I

       =  LÉONARD DE VINCI

(excuse the markdown roughness)
@the_architect

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