Help with Cryptomethodology.

[Jragon]

Hello People,

 

I need a little help in making my own encryption thingy. It wont be used for sucuraty I'm just doing this so i can broden my knowage of php.

 

What my encryption will do:

 

QAZ = WSX

WSX = EDC

EDC = RFV

RFV = TGB

TGB = YHN

.

.

.

 

 

I was wondering if someone could point me in the right direction?

 

Thanks

 

Jragon

[Mchl]

PLM = ?

[Daniel0]

How did you come up with those transformations? Did you just pick them at random?

[Mchl]

That seems to be qwerty keyboard layout shifted right one column. str_replace should be enough.

[Jragon]

QAZ = WSX

WSX = EDC

EDC = RFV

RFV = TGB

TGB = YHN

UJM = IK

OLP = QAZ

[Mchl]

  Quote

UJM = IK

 

Erm... Three letters encrpypted into two? Anyway, take a look into str_replace() function.

[Daniel0]

strtr('qazwsx', 'wsxedc', $string);

 

Fill out the rest yourself.

 

http://php.net/strtr

[Jragon]

This is what i have done so far:

<?php
function crypty($string){
    $search  = array('Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'z', 'x', 'c', 'v', 'b', 'n', 'm');
    $replace = array('W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', 'Z', 'X', 'V', 'B', 'N', 'M', ' ', 'Q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'a' 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'z', 'x', 'c', 'v', 'b', 'n', 'm', 'q');
    $subject = $string;
    $output = str_replace($search, $replace, $subject);
    return $output;
}
$encypt = 'Hello'
echo crypty($encrypt);
?>

but there an error:

Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting ')' in C:\xampp\htdocs\cript.php on line 4

[Mchl]

You've missed on comma (between 'a' and 's')

[Jragon]

Now all I'm getting is 4 q

 

Thanks jragon

 

I also fixed 2 errors with the $encrypt and a ;

[Daniel0]

This should do what you want:

 

<?php
function encrypt($string)
{
    return strtr($string, 'QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm', 'WERTYUIOPASDFGHJKLZXCVBNMQwertyuiopasdfghjklzxcvbnmq');
}

echo encrypt('WSX');