Random key value pair authentication: Authenticate human users using random value pairs

Class: random key value pair authentication
Version: 0.1 10/14/2017

Released into the public domain

Description:

This class will authenticate human submissions through random key value pairs.

Installation:

Upload files to a web accessible location on your server (eg. public_html)


Configuration:

No configuration needed.


Usage:

This class uses a serialized object to store the last key value pair for authentication in the session.

If you don't know what I am talking about, that is okay, it just means that you must instantiate the class after the session has been started.

This allows human verification without any intreaction with the human.

session_start();
include('rndkvp.class.php');
if( empty($_SESSION['humanCheck']) ){
    $humanCheck = new rndkvp(10);
}else{
    $humanCheck = unserialize($_SESSION['humanCheck']);
}

1. If the session has not been started elsewhere, start it before instantiating the class.
2. Include the class file.
3. If the class object has not already been saved to the session, instantiate as normal, otherwise load it from the session.

rndkvp takes 1 argument...

length = length of the generated key value pairs, defaults to 8

After all processing has been completed, the object must be saved to the session...

$_SESSION['humanCheck'] = serialize($humanCheck);

Refer to the test.php file for usage examples. Point your browser to this file to see how it works.

Methods

createFormInput() creates a hidden input form field containing the random key value pairs

validate( $value ) validates the submitted value

resetKVP( $length ) generates new random key value pairs


Changelog

0.1

Initial beta release