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The names are those of film actors and actresses.
Each actor is paired with an actress, according to a film they
both starred in, and their names encrypted with a simple substitution
cipher based on the name of the film as a keyword.
Example
For the 1991 film, The Silence of the Lambs, repeated letters are
removed from the film title, giving:
THESILNCOFAMB
The missing letters are then added, giving:
THESILNCOFAMBDGJKPQRUVWXYZ
This is then rotated to give the ciphertext alphabet:
RUVWXYZTHESILNCOFAMBDGJKPQ
This is used as the ciphertext alphabet to encrypt Anthony Hopkins
and Jodie Foster:
| Plain: |
ABCDEFGHIJKLMNOPQRSTUVWXYZ |
| Cipher: |
RUVWXYZTHESILNCOFAMBDGJKPQ |
| ANTHONY HOPKINS |
|
JODIE FOSTER |
| RNBTCNP TCOSHNM |
|
ECWHX YCMBXA |
What's next?
Now all you have to do is work out the other 19 pairs, and find
the hidden quotation!
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back to: GCHQ Challenge December 2004
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