Hi!

Anyone any good with codebreaking?....

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

written in the alphabet A, B, . . . , Y, Z. Both alphabets have N = 26 letters.

Consider the affine cipher on digraphs with encryption

E($\displaystyle \pi$) = 9$\displaystyle \pi$ + 43mod676:

Encipher the plaintext TRUTHS.

In this question I want to use standard numbering, so A=0, B=1..... Z=25