Decode A Sha1 Encryption

I decided to sha1 passwords into the database for the creation of a user account. When logging into the system, this sql statement works, but I can't figure out how to reverse it, so I'm assuming this is a one-way encryption: PHP Code:

$sql = "SELECT email, password, first
FROM `account`
WHERE `email` = '" . addslashes(htmlspecialchars($AdminID)) . "'
`password` = '" . sha1(addslashes(htmlspecialchars($AdminPswd))) . "'";

I need to have a statement to retrieve the encryption and decode it for password retrieval (when a user lost their password). Is there a way to decode this or should I choose another encryption technique (2-way) other than the basic base64_decode/base64_encode?


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I want to know to decode sha1 encoded url into normal url.

Example:<sha1 code>/index1.htm

I want this to:

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my answer was answered about password protection(php users passwords protection) and my final code:

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Let's say for strongest security, I want to encrypt IP, signup date, just everything. But in admin panel I want to retrieve that info, so it means I need decript itIs it possible from this script/function to make a decrypt script/function?

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function checklogin($username, $password){
global $mysqli;


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Another n00b question but when inserting data into a database using SHA1 do you need to do this: PHP Code:

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or something like that, and when retrieving from it: PHP Code:

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Or can you just got $_POST['password']
Sorry I dont know how this works. Also what is a snippet for salting a sha1 command.

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Both will return same values. Where does CodeIgniter uses encryption_key?

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I've tested this out by submitting (username1, password1) and (username2, password2) Both "password1" and "password2" are encrypted to the same string:

da39a3ee5e6b4b0d3255bfef95601890afd80709 or d41d8cd98f00b204e9800998ecf8427e to be doesn't matter what I use for the password

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MD5CryptoServiceProvider MD5 = new MD5CryptoServiceProvider();
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I've been reading up on password encryption and I've always used MD5 but seems like its not very secure any more, so now am wondering what's better MD5 VS SHA1 VS AES_ENCRYPT?

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// Database Connection
$con = getConnection();
$sqlQuery = mysql_query("SELECT count(*) from Customers

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For a log-in page I have created a mysql db and user registers
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As an example:

The binary secret from RST is
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The question right now is about how to create a table with PHP that will enable SHA1 hashing without requiring me to log in to phpMyAdmin and select it from the drop down. what I'm asking is can the SHA1 be written as part of a PHP table creation script?

Here's what I've tried.

$sql = "CREATE TABLE Members
mem_username varchar(12) NOT NULL UNIQUE,
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