Master Keyword Cipher Encryption & Decryption in Java 🔐

Keyword Cipher in Java
01:22 - Keyword Operations
02:51 - Checking repetition of letters in keyword
04:50 - Alphabet generation with keyword and removing keyword letters from alphabet
07:06 - Encryption
09:24 - Decryption

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Keyword cipher encryption and decryption using java

Keyword is a monoalphabetic substitution cipher, its algorithm is as following:
- Pick a letter as a keyword but no letter of alphabet should repeat in this keyword
- Write that word at beginning of alphabet and remove it's letters from alphabet, this version of alphabet will be

used for encryption
- Write alphabet under the version of alphabet created above
- Replace each letter of message with a letter at position of alphabet in keyword alphabet
- To Decrypt a letter of message, replace that letter in keyword alphabet with a letter in alphabet at that position