<?php
	$key = md5('ISCC');
	$str = base64_decode('fR4aHWwuFCYYVydFRxMqHhhCKBseH1dbFygrRxIWJ1UYFhotFjA=');
	$klen = strlen($key);
	$len = strlen($str);
	$x = 0;
	for ($i=0; $i < $len; $i++) { 
        	if ($x == $klen){
			$x = 0;
        	}
        	$char .= $key[$x];
        	$x+=1;
    	}
	for($i = 0; $i < $len; $i ++){
		$data .= (ord($str[$i])-ord($char[$i]))>0?chr(ord($str[$i])-ord($char[$i])):chr(ord($str[$i])-ord($char[$i])+128);
	}
	print($data);
?>