Re: Information on Cookies
| From: | Ian | Date: | Wed, 15 Oct 2008 15:11:25 +0000 |
| Subject: | Re: Information on Cookies | ||
| References: | 1 2 3 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-281956@lists.php.net to get a copy of this message | ||
On 15 Oct 2008 at 16:04, Ben Stones wrote:
> Can you explain to me the benefits of hashing/encrypting/md5'ing cookie
> values? I don't see how it'd stop hackers from changing cookie values?
Hi,
You would keep a copy of the hash on the server and check that against the submitted
value. If they are different then the cookie has been modified.
Regards
Ian
--
>
> 2008/10/15 Stut <stuttle@gmail.com>
>
> > On 15 Oct 2008, at 15:23, Ben Stones wrote:
> >
> >> I've read a few videos on cookie security and it makes sense that people
> >> can
> >> modify cookie values which is a problem I'm trying to figure out to *try*
> >> and prevent. What I'll first do is at the top of the page that validates
> >> if
> >> the cookie values is in the database, but what my next problem is they'd
> >> use
> >> usernames in the database as the vaues. Are there any preventable measures
> >> to prevent cookie forging or what not.
> >>
> >
> > You can encrypt or hash the cookies to prevent tampering...
> >
> > http://stut.net/blog/2008/07/26/sessionless-sessions-2/
> >
> > -Stut
> >
> > --
> > http://stut.net/
> >
>