[SOLVED] encoding and decoding

do anyone know about Hill chiffer encoding.
how to decode or encode this?
Matrix given: 3/2 3/5
Decoded word: VAWWVAGB

Btw the decoded string for the above encoded string is : DECODEDZ

2 Likes

thanks i got it

1 Like

you need to find the inverse of the key matrix, let it be (k inverse)
since both the matrix is of order 3 , you need to create seperate matrix with three rows and use formula
[3*1 matrix] * (k inverse) mod 26, i know you wouldn’t get the idea from here so i am posting a youtube video below

1 Like