Ave,

Yes I doubted MAC address could be recorded so easily, and I highly doubted
Key.Com's application had anything to do with a MAC Address.

If it's Cookie-Based, then in my opinion it's more of a 'show' then any
actual, vital security implementation. I have everything from Cookies, IP
Filter, SSL (https) to secure database-enabled user/pass authentication
going on. 

I was curious to know what Key.Com was exactly doing.... Maybe something I
missed.... I was curious to know how they were identifying each individual
computer? What they were recording (or storing) to differentiate and thus
uniquely id a computer.

Thanks for your response.


On 10/2/06 8:23 AM, "Stut" <[EMAIL PROTECTED]> wrote:

> Rahul S. Johari wrote:
>> I saw this at the Key.Com website for Keybank Customers. When you go to
>> their website to login to view your account, they ask you to register your
>> computer for the first time. Once your computer is registered, you can
>> access the account using that computer. You can choose to Not register that
>> computer and you won¹t be able to access the account using that computer in
>> future. 
>> 
>> What exactly are they doing?
>>   
> It's almost certainly cookie-based.
>> Can PHP record the MAC Address of the NIC in the computer? Or are they just
>>   
> PHP cannot access this information without using a client-side
> technology such as ActiveX.
>> recording the IP and creating an IP based filteration?
>>   
> This would be unreliable at best so I doubt they would be using this method.
>> I¹m looking to implement a similar security system for one of my
>> applications.
>> 
>> Any advice?
> There are many ways to attempt to do this, but bear in mind the
> fundamental fact that nothing that comes from the client-side is
> reliable. Anything you store there can be comprimised and should not be
> used to bypass security checks if security is at all important in your
> application.
> 
> -Stut

Rahul S. Johari
Supervisor, Internet & Administration
Informed Marketing Services Inc.
500 Federal Street, Suite 201
Troy NY 12180

Tel: (518) 687-6700 x154
Fax: (518) 687-6799
Email: [EMAIL PROTECTED]
http://www.informed-sources.com

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