id-offuscation concept.php

id-offuscation concept.php

<?php

include 'vendor/autoload.php';

//This hash must be a constant (user defined)
$tiny = new \ZackKitzmiller\Tiny('abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ5SX0TEjkR1mLOw8Gvq2VyJxIFhgCAYidrclDWaM3so9bfzZpuUenKtP74QNH6B');

$firstletterSeparator = 'h';
$lastletterSeparator = 'h';

echo 'Original: ';
echo $id = 3;
echo PHP_EOL;
echo PHP_EOL;

echo 'Encoded LV1: ';
echo $id = $tiny->to($id);

echo PHP_EOL;
echo PHP_EOL;

echo 'Encoded LV2 (will be made public): ';
echo $encoded = md5("Blog").$firstletterSeparator.$id.$lastletterSeparator.md5("Post");
echo PHP_EOL;
echo PHP_EOL;

echo '----------------------------------------------'.PHP_EOL;
echo 'Given public id, '.$encoded.', decode';
echo PHP_EOL;
echo '----------------------------------------------'.PHP_EOL;


echo 'Decoded LV2: ';
echo $encoded = ($encoded);
echo PHP_EOL;

echo $encoded = ltrim($encoded, md5("Blog"));
echo PHP_EOL;
echo $encoded = rtrim($encoded, md5("Post"));
echo PHP_EOL;
echo $encoded = ltrim($encoded, $firstletterSeparator);
echo PHP_EOL
echo $encoded = rtrim($encoded, $lastletterSeparator);
echo PHP_EOL;
echo PHP_EOL;

echo 'Decoded LV1: ';
echo $encoded = $tiny->from($encoded);
echo PHP_EOL;
echo PHP_EOL;

Can be hardenned by adding and substracting a number too.
Eg: $id=1, lets encode by adding 1+512 and in decode do 513-512 = 1

Adds an additional level, makes hard to guess and it's computationally cheap.