I am a bad hacker and watching your line.  I see cookies A and B go to you.
I set cookies A and B in my web browser.  I am now you.  You can try to 
permute the cookies with IP# (breaks on proxies) or Browser type, but all
cookie based approaches believe in the value of something sent cleartext.
Or use SSL.

-j

On Thu, Apr 27, 2000 at 12:34:30PM -0700, Nick Tonkin wrote:
> On Thu, 27 Apr 2000, Marc Slemko wrote:
> 
> > Cookies are not secure and will never be secure.  They may be "good
> > enough", and you may not have much choice, but they are still simply not
> > secure when you put everything together.
> 
> Can you be more specific about why you say that? If I set an encrypted,
> short-lived cookie upon validated authentication, why is that any less secure than 
>any
> of the other approaches you mentioned?
> 
> 
> - nick
> 

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