Playfair cipher: Difference between revisions

# Translate key into an encoding 5x5 translation matrix.

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

m = reshape(keyletters[1:25], 5, 5)

# encod is a dictionary of letter pairs for encoding.

encod = Dict()

canontxt = canonical(txt)

letterpairs = map(x -> canontxt[x], findall(r"(.)(?:(?!\1)(.))?", canontxt))

if isencode

# Encode text