Xor Encrypt Decrypt Php Online
So you should xor each data character with each key character – zerkms Dec 14 '12 at 9:36 1.The data is Base64 decoded 2.Each character in the decoded string is xored sequentially against each character of the key we previously identified. I have been looking around for an algorithm that will encrypt a string and decrypt a string using a key. This would require 4 functions that impliment the same algorithm in VB6 and PHP. [SOLUTION] Code Request Encrypt and Decrypt using XOR for PHP And VB6. Gmp_xor (PHP 4 >= 4.0.4, PHP 5, PHP 7). It is used to encrypt stealth submarine's orders. I cannot agree with 'kid-sister' post below. Impossible to decrypt. Encrypt or decrypt XOR using our free online tool, it works with hexadecimal, binary and text. This tool uses the mcrypt_encrypt() function in PHP, so for more infos about the parameters used check the manual. You might also like the online decrypt tool.
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_xor — Bitwise XOR
Description
Calculates bitwise exclusive OR (XOR) of two GMP numbers.
Parameters
aEither a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
bEither a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number. How to decode php files that encoded by zend encoder decoder.
Return Values
A GMP number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.
Examples
Example #1 gmp_xor() example
<?php
$xor1 = gmp_init('1101101110011101', 2);
$xor2 = gmp_init('0110011001011001', 2);
$xor3 = gmp_xor($xor1, $xor2);
echo gmp_strval($xor3, 2) . 'n';
?>User Contributed Notes 5 notes
To be unbreakable XOR encryption must have a key that is totally random and is never re-used. If you use a key a second time, it can be broken. This can be confirmed by reading the page at http://en.wikipedia.org/wiki/One-time_pad.
Although I am not an expert on cryptography, I understand that decyphering involves recognizing patterns and that it would be possible to decrypt code that was encoded using XOR with the same key if there were enough samples to examine. Maintaining unique keys for each encryption at both encryption and decryption points to ensure 100 percent unbreakability has security problems of its own - where and how are the keys stored and how are they transmitted to the decryption points?XOR encryption is an ultimate encryption algorithm. It can't be be broken. It is used to encrypt stealth submarine's orders. I cannot agree with 'kid-sister' post below. If you use vast key (as long as encrypted message) which is random (space noise recorded on a cd), the encrypted message is also radnom - impossible to decrypt without key. Under those conditions, XOR is strongest encryption algorithm ever known.XOR encryption only works if the key is at liest the same size as the plaintext, and the key is perfectly random. And no, rand() is not perfectly random.Xor Encrypt Decrypt Php Online Editor
The logical XOR can be used for encrypting data. Use resource A as your original text and resource B as the key. Be sure to use long enough key so that the key doesn't loop. Decryption works the same way, input encrypted text as res A and key as res B.Xor Encrypt Decrypt Php Online Test
here's a fast alternative to compute the xor-value of two bitstrings of an arbitrary (but same) length.
<?php
/**
* xor-op for bitstrings of arbitrary length
* bitstrings must have same length
*
* @param string $o1
* @param string $o2
* @return string
*/
function bitxor($o1, $o2) {
$xorWidth = PHP_INT_SIZE*8;
$o1 = str_split($o1, $xorWidth);
$o2 = str_split($o2, $xorWidth);
$res = ';
$runs = count($o1);
for($i=0;$i<$runs;$i++)
$res .= decbin(bindec($o1[$i]) ^ bindec($o2[$i]));
return $res;
}
?>Php Aes Encrypt Decrypt
- GMP Functions
- Deprecated