> To make it more difficult to DOS servers using SSL, the protocol could > somehow be modified to challenge the client with some useless** but > cpu-heavy calculation before the server starts acting. Of course it > must be something that does not involve heavy calculation at the > server side, otherwise its just dumb. It's just an idea, and I do not > know if and how this is possible at all.
One problem I can foresee with this is a way to scale this in a secure manner. At one end of the spectrum you could have Grandma on her little 1.something ghz atom and on the other a mutli processor system or maybe even GPU. It could take many years to crack for a GPU but then unless ther is a way to scale that back to make it possible for the little atom (without being able to use the GPU for the weaker challenge). I have never actually looked at doing this and would be interested if there is actually a way to do this without it being weak in some way. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
