My Encrypted Password Script :)

**mburt** · 08-01-2006, 11:18 PM

Hi,

I've been working on this script for AGES.. it uses a series of numbers to figure out what the password is, and then verifies. It's almost like.. it's too good to be true, but that's exactly what I'm trying to figure out. I think there may be something wrong with it.

The password is "password"

So go ahead, I'm ready for insults.

Code:

<html>
<head>
<script>
function securepass() {
var alpha=new Array("","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z")
var combo=new Array('',16,1,19,19,23,15,18,4)
var notCorrect=false
for (i=1;i<=combo.length-1;i++) {
inputH.value=inputH.value.substring(0,i)+alpha[combo[i]]
if (input.value==inputH.value) {alert("Correct Password");notCorrect=false;input.value=''}
else {notCorrect=true}
}
if (notCorrect==true) {alert("Invalid Password");inputH.value='';input.value=''}
}
</script>
</head>
<body>
<input id="input">
<br><input type="button" value="Log In" onclick="securepass()">
<input id="inputH" style="display:none">
<br>Type in "password", and then try other combinations.
</body>
</html>

**mburt** · 08-01-2006, 11:44 PM

To be more specific, I'm looking for someone to verify this script.

**Twey** · 08-02-2006, 12:16 AM

I'm no crypto expert, but I think this is reversible. It would certainly be possible to figure it out from the value of inputH...

**mburt** · 08-02-2006, 12:34 AM

Thanks, I'll try to make it better. I honestly didn't know how to improve, so that's why I posted this thread.

**Twey** · 08-02-2006, 12:39 AM

Ah, I see. The key here is to come up with an algorithm that, will take any data given to it and transform it in such a way that it can't be transformed back, and gives no clue as to the original data.

Or, you could nick someone else's, like I did.

**mburt** · 08-02-2006, 12:43 AM

So, I would create a number/letter pattern for a single letter, which would be hard to crack. Anyways, I'll be working on it for a while, so thanks for all your help

**mburt** · 08-02-2006, 12:46 AM

What I originally had as a password thingy was this: (it's horrible)

Code:

<script>
function testPass() {
if (input.value=="password") {alert("Correct")}
else {alert("Incorrect")}
}
</script>

So I kept trying to come up with a way to make it more secure. Then I came across a number/letter system to convert numbers to letters.

I'll try to upgrade from here.

**mburt** · 08-02-2006, 01:18 AM

But I'm still not sure on how to do this.. I know I have to search a string for letters, and translate it into a series of characters. But that's pretty much it. Any help would be appreciated

**Twey** · 08-02-2006, 01:32 AM

You have to do it in such a way that it can't be reversed.

Look at Rob Heslop's for an idea (although not a role model): his script takes the ASCII value of each character and multiplies it in with the rest. That's irreversible, since there are quite a few possibilities that would yield the same result.

**mburt** · 08-02-2006, 02:04 AM

Could you provide a link to this?

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