Vigener Subtitution

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.

Plain(with point '.') :

Key(with point '.') :

Caesar Algorithm

Caesar is an Algorithm which create by Yulius Caesar for encrypt his message text with
Chiper = Plain + 3 ;

Modern Caesar is not only plain + 3, but the key can be the other of modulus 26 or can use the mix alphabtic for encryption.

we can make a php program of caesar :

1. make the input page.

2. make the algorithm of caesar.

3. Testing the program.

Text(with point '.') :
Key(a number) :