Vigener is an Algorithm of plain encryption with caesar columnar subtitution.
so,every plain in colum encrypt with caesar Algortm by an different key.
Key : A T T A C K
Plain : M I S S I O
Chiper: M B L S K Y
Plain : N C A N C E
Chiper: N V T N E O
Plain : L E D
Chiper: L X W
So from the plain mission canceled encrypt with key ATTACK we can get the chiper text : MBLSK YNVTN EOLXW
we can make the php program of Vigener algorthm:
1. make the input text.
2. make the program.
3. testing the program.
