a) The decoded message is: POLYC ENTEC HNICU
The first step to decode the message is to convert to Numerical Coordinates:
makefile
BBHYY => 21 21 25 25 12
ACWWL => 11 23 23 15 12
NTAZA => 34 44 15 34 11
PLLBS => 35 31 31 22 15
CHQOT => 23 34 35 25 44
PIA => 33 15 11
2. Then combine the coordinates vertically:
21 21 25 25 12
11 23 23 15 12
34 44 15 34 11
35 31 31 22 15
23 34 35 25 44
33 15 11
b) So, read it Horizontally and it will be: POLYC ENTEC HNICU
A decoded message refers to the process of converting an encoded or encrypted message back into its original, understandable form.
So, Decoding is the reverse process, where the encoded message is translated or deciphered to reveal its intended meaning. In the context of communication systems, decoding often involves using a specific algorithm, key, or method to interpret the encoded data.
See text
This problem-based learning (PBL) question involves encoding/decoding using a Bifid cipher.
Consider the following secret message:
“BBHYY ACWWL NTAZA PLLBS CHQOT PIA”
It has been encoded using a Bifid cipher with key ‘Polytechnic’ and period or block size 5.
Search the Internet for information about Bifid Cipher, to help you understand the method.
Show 5x5 Polybius square with horizontal key.
Decode the message.
3. Show your work.