We can decode DVD only by seven Perl programming lines to make administrator easily finish his task. Perl DVD cracking code is shown as follows:

$_='while(read+STDIN,$_,2048){$a=29;$b=73;$c=142;$t=255;
@t=map{$_%16or$t^=$c^=( $m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;
$t^=(72,@z=(64,72,$a^=12*($_%16 -2?0:$m&17)),$b^=$_%64?12:0,@z)[$_%8]}(16..271);
if((@a=unx"C*",$_)[20]&48){$h =5;$_=unxb24,join"",@b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;
$ d=unxV,xb25,$_;$e=256|(ord$b[4])<<9|ord$b[3];
$d=$d8^($f=$t&($d12^$d4^ $d^$d/8))<<17,$e=$e8^($t&($g=($q=$e14&7^$e)^$q*8^$q<<6))<<9,$_=$t[$_]^ (($h=8)+=$f+(~$g&$t))for@a [128..$#a]}print+x"C*",@a}';
s/x/pack+/g;eval