Hi everyone,

Anybody know how to break this code?

Let plaintext be written in the alphabet a, b, . . . , y, z and let ciphertext be
written in the alphabet A, B, . . . , Y, Z.

So standard numbering is used so A=0, B=1....Z=25

Suppose that an affine cipher on digraphs has been used to encrypt the plaintext
mart as the ciphertext NXYC. Determine the formulae for encryption and decryption.
Decrypt the ciphertext BWKPED.