Caesar Cipher Encryption and Decryption in Java
Ceasar Cipher in Java
Hi!! In this video I'll be coding ceasar cipher encryption and decryption using Java
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Caesar Cipher is subsitution cipher, its algorithm is as following:
Take alphabetic message (A to Z)
Take a key (1 to 26) (1 being A and 26 being Z)
To encrypt, left-shift or right-shift message letter by letter by the value of key
For example
if message is "ABC" and key is 1 and we are performing right-shift then encrypted text will be A+1 = B, B+1 =
C, C+1 = D. ABC = BCD, BCD being encrypted text.
To decrypt, left-shift or right-shift the message letter by letter opposite to the shift performed in
encryption by the value of key
For example
if encrypted text is "BCD" and key is 1 and we are performing left-shift then encrypted text will be B-1 = A,
C-1 = B, D-1 = C. BCD = ABC, ABC being decrypted text.
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