Cryptography20815 marksNumerical: Playfair cipher encryptionSubstitution Techniques
Show the encryption of plain text "ALGORITHM" using the key "PSEUDOCODE" using playfair cipher.
Show the encryption of plain text "ALGORITHM" using the key "PSEUDOCODE" using playfair cipher. [5]
- Plaintext: ALGORITHM - Key: PSEUDOCODE - Convention: I/J share one cell (standard Playfair) --- Key: P S E U D O C O D E Remove duplicates (keep first occurrence): P, S, E, U, D, O, C (The second O, D, E are dropped.) Fill remaining letters A, B, F, G, H, I/J, K, L, M, N, Q, R, T, V, W, X, Y, Z...