Playfair cipher: Difference between revisions

# Translate key into an encoding 5x5 translation matrix.

keyletters = unique([c for c in canonical(key * "ABCDEFGHIJKLMNOPQRSTUVWXYZ")])

m = Char.((reshape(UInt8.(keyletters[1:25]), 5, 5)'))

# encod is a dictionary of letter pairs for encoding.

encod = Dict()

# Map pairs in same row of matrix m.

for i in 1:5, j in 1:5, k in 1:5