reference id

elle_girl

I want to create a digital cash system. When the customer login in this system they will get a token which like a reference id where for different session the customer get different reference id. For example I enter the system after login it appear your reference id is xxxxxxxxx (about 1 minutes) after that it go to the other page. Do I need to have my own database for that particular reference id that will be appear. Besides that this reference id that the customer see as smile in the plaintext but at the server(the bank) will see text in decrypted/encrypted message. Can I just do the the ecrypt/decrypted in mysql such as PASSWORD() .Can you please help me to do the coding for this part? I really have no idea.
P.s. If possible can u give me the source code in php to do this task?

planetsim

Ok lets start at the beginning, I understood abou 1% of that, which was "P.s. If possible can u give me the source code in php to do this task?"

Ok firstly to answer that, I doubt anyone would unless you paid them however of course they would need to understand the problem a little better, have you even attempted to do this yourself?

PHPMagician

elle_girl (French?): I didn't really understand all the either. But I assume you want to assign a user a unique id (which really acts as a session id) which expires after a minute (which is quite quick). Then, you want them to go to a page. You want them to see the reference id and a smile. Well, I don't really get the smile: a picture of a person smiling, to promote the happiness of the area (I am sure you have a lovely smile, and would promote the happiness, but I doubt this is what you mean:p). So, I don't get the smile part, obviously. Is that a term I am just unaware of, meaning clear-text or something.

Anyway, then you want to communicate the reference id to the bank, encrypted (for security reasons) to complete a transaction. You are wondering if password() would be suffecent.

Have I got a jist on the problem at hand at all?

Define other page, what does this other page do.

Define smile.

You would need a way to track reference ids, database being an effective method.

I don't think I have got the problem right, please try explaining it a bit better.

Good Luck

elle_girl

As I have no idea to do this task, I didn't try yet for the reference id.What I mean when the customer enter the system it will be given a reference id where this id will be use to do the transaction such as purchase the product. This id should be unique. My problem here how to generate the reference id. I hope you can understand? If still not understand just let me know.

PHPMagician

I kind of get what you mean but it is too vague for me to really offer a solution and too broad of an application for me to present a solution free of charge. 😃 However, look at the PHP manual at session management - maybe it will give you some ideas.

http://www.php.net/session

There are plenty of tutorials on the topic, look through the user notes for handy tips and sometimes vital information regarding security, performance, etc.

elle_girl

I am thinking to do the encrypt using the mcrypt but there got error.This is the sample source code that i get from the book.Can u help me to solve the problem regarding the coding.
<?php
$plaintext = "Four score and seven years ago";
$cipher = MCRYPT_TRIPLEDES;
$mode = MCRYPT_MODE_ECB;
$rand_src = MCRYPT_DEV_RANDOM;
$password = 'Extra secret password';

print ("Plaintext: $plaintext\n");

// Ok, let's encrypt the data
$handle = mcrypt_module_open ($cipher, ' ' , $mode, ' ');
if ($handle)
	die ("Couldn't locate open mcrypt module for '$cipher', algorithm");
$iv_size = mcrypt_enc_get_iv_size ($handle);
$ivector = mcrypt_create_iv ($iv_size, $rand_src);
if (mcrypt_generic_init ($handle, $password, $ivector) == -1)
	die ("Error: mcrypt_generic_int() failed.");
$ciphertext = mcrypt_generic ($handle, $plaintext);
mcrypt_generic_end ($handle);

print ("Ciphertext: " . bin2hex ($ciphertext) . "\n");

// Now let's decrypt it
$handle = mcrypt_module_open ($cipher, ' ', $mode, ' ');
if (!$handle)
	die ("Couldn't locate open mcrypt module for '$cipher' algorithm');
if (mcrypt_generic_init ($handle, $password, $ivector) == -1)
	die ("Error: mcrypt_generic_init() failed also.");
	$plaintext = mdecrypt_generic ($handle, $ciphertext);
mcrypt_generic_end ($handle);

print ("Plaintext: $plaintext\n");

elle_girl

I guess i got problem with mcrypt.Cannot run at my pc. Do this problem occur because of the installation that i didn't made yet for a directory that handle mcrypt. Can u help me with the installation?