Created
December 21, 2010 11:19
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simple encrypt data using rsa algoritm
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<?php | |
if(!empty($_POST['enkrip'])){ | |
$n=$_POST['n']; | |
$e=$_POST['e']; | |
$teks=$_POST['teks']; | |
//pesan dikodekan menjadi kode ascii, kemudian di enkripsi per karakter | |
for($i=0;$i<strlen($teks);++$i){ | |
//rumus enkripsi <enkripsi>=<pesan>^<e>mod<n> | |
$hasil.=gmp_strval(gmp_mod(gmp_pow(ord($teks[$i]),$e),$n)); | |
//antar tiap karakter dipisahkan dengan "." | |
if($i!=strlen($teks)-1){ | |
$hasil.="."; | |
} | |
} | |
} | |
?> | |
<html xmlns="http://www.w3.org/1999/xhtml"> | |
<head> | |
<title>Enkripsi rsa</title> | |
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> | |
<style type="text/css"> | |
input,label{ | |
display:block; | |
} | |
textarea{ | |
font-family: Helvetica, Arial; | |
line-height: 1.1em; | |
font-size:15pt; | |
text-align:left; | |
width:800px; | |
height:400px; | |
} | |
#hasil{ | |
padding:20px; | |
background:gray; | |
color:lightgreen; | |
font-family:monospace; | |
} | |
</style> | |
</head> | |
<body> | |
<?php | |
if($hasil){ | |
echo "<textarea id=\"hasil\">".$hasil."</textarea>"; | |
} | |
?> | |
<form id="enkripsi" name="enkripsi" method="post"> | |
<textarea name="teks" id="teks"></textarea> | |
<label for="n">n (desimal)=</label><input type="text" name="n" id="n" size="30" value="" /> | |
<label for="e">e (desimal)=</label><input type="text" name="e" id="e" size="10" value="" /> | |
<input type="submit" name="enkrip" id="enkrip" value="enkrip"/> | |
</form> | |
</body> | |
</html> |
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