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.

Thanks!