I have watched so many documentaries about decoding but I didn’t understand very well. What I know is move the letters of the word to the front of the alphabet and then move by 1 each time. Example with the word ‘coin’
C O I N A B D E F G H J K L M P Q R S T U V W X Y Z
O I N A B D E F G H J K L M P Q R S T U V W X Y Z C
I N A B D E F G H J K L M P Q R S T U V W X Y Z C O
… and so on so forth but how do they know which letter is which.
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In your example the word to encode is “coin”
To encode it we will use the simple “move by 1” method, also called a “cypher”
C becomes D
O > P
I > L
N > M
the **encoded** word is DPLM, also called cyphertext.
Reverse the process (subtract a letter) to **decode**.
We can add values for different letters , so a C could shift 3 letters, and a N shift 1 or 0,
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