Question: Decipher the ciphertext EB QX ZL HD LK IV QG OM AL EB VB DO SG SF ZR AN DA MO LB SE EL SO
Decipher the ciphertext
EB QX ZL HD LK IV QG OM AL EB VB DO SG SF
ZR AN DA MO LB SE EL SO ZL KD CO ZF GS IN
if we know that a Playfair cipher is used for which the plaintext
THEWINTEROFOURDISCONTENT
is enciphered as
WGNZDZWNISOSBHGRREAZWNTW
Hint. From the plaintext-cyphertext pairs, you can notice certain between letters. It is very useful if two such pairs have a common letter. One such pair of pairs of letters is the last one: NTTW. This means that the three letters N, T, W are in the same line (row or column). Search for other such pairs. This reconstructs a part of the key-square for the cipher. The rest is determined by trial and error.
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