A keyword cipher is a form of . A keyword is used as the key, and it determines the letter matchings of the cipher alphabet to the plain alphabet. Repeats of letters in the word are removed, then the cipher alphabet is generated with the keyword matching to A, B, C etc. until the keyword is used up, whereupon the rest of the ciphertext letters are used in alphabetical order, excluding those already used in the key.
Input :
Keyword : secret
Message : Zombie Here
Output :
Ciphered String : ZLJEFT DTOT
Take the first example, we used "secret" keyword there.
Plain Text : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
When "secret" keyword is used, the new encypting text becomes :
Encrypting : S E C R T A B D F G H I J K L M N O P Q U V W X Y Z
This means 'A' means 'S', 'B' means 'E' and 'C' means 'C' and so on.Lets encode the given message
"Zombie Here"ZOMBIE HERE becomes ZLJEFT DTOT
