CODEWITHSUNDEEP
php
user2137179
user2137179

Reputation:

Obfuscate IDs [pages, users ...] with a static number of digits

I was searching for a way to obfuscate the IDs that are show to the end user. But with a static number of digits Like the md5() function, with the ability of reversing back to the original ID.

e.x: 1 => N9VRD7QB4SG2 e.x: 999999999 => RC401BALV74W

Upvotes: 0

Views: 91

Answers (2)

Schrute
Schrute

Reputation: 731

I guess the simplest solution is to use the first N chars from a hash of the original ID (plus a salt) and storing the association on a database table:

hash_id | original_id

You can choose a hashing algorithm following these advices: http://www.php.net/manual/en/faq.passwords.php

EDIT: as zerkms wrote, you want to add a UNIQUE index on the hash_id column in order to avoid colliding hashes.

Upvotes: 1

Ed Heal
Ed Heal

Reputation: 60017

id = oldid ^ 0xfedad1234;

Coded

now

oldid = id ^ 0xfedad1234;

Back to the original

No SQL involved

Upvotes: 3

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