Re: Hamiltonian path as protection against DOS.

2006-08-20 Thread Anne Lynn Wheeler
mikeiscool wrote: Could this sort of system be something that is implemented way before a HTTP connection even starts? Say, implemented by OS vendors or API vendors of sockets. That is to say, when you open a socket connection for the first time, for certain protocols, you need to pay this fee.

Re: Hamiltonian path as protection against DOS.

2006-08-20 Thread alan
On Tue, 15 Aug 2006, Bill Stewart wrote: Crypto is usually about economics and scalability. If you're doing this for DOS/DDOS prevention, you don't need the NP-completeness perfection you get from Hamiltonian paths or similar problems - SHA is fine, or any other hash that's quick to verify and

WEP's dead-er: The Final Nail in WEP’s Coff in

2006-08-20 Thread Ariel Waissbein
IMHO, an interesting read: tapir.cs.ucl.ac.uk/bittau-wep.pdf The Final Nail in WEP’s Coffin Bittau, A. Handley, M. Lackey, J. University College London; This paper appears in: Security and Privacy, 2006 IEEE Symposium on Publication Date: 21-24 May 2006 On page(s): 386- 400 Authors

Re: Hamiltonian path as protection against DOS.

2006-08-20 Thread James A. Donald
-- alan wrote: But if the packets are forged, wouldn't that turn it into a different kind of DOS? If I can get you to blacklist Alice by sending n forged attack packages, then my DOS succeeded, if my goal is to deny a connection between you and Alice. The goals is usually to shut down

Re: Hamiltonian path as protection against DOS.

2006-08-20 Thread James A. Donald
-- Anne Lynn Wheeler wrote: as an aside, i've pointed out before that in the mid-90s that as webserver activity was increasing ... a lot of platforms experienced severe throughput degradation with HTTP transaction protocol use of TCP. Most platforms had a highly inefficient session

Re: Hamiltonian path as protection against DOS.

2006-08-20 Thread James A. Donald
-- Anne Lynn Wheeler wrote: so a real SSL simplification, when the client contacts the domain name infrastructure to do the domain name to ip-address translation, the domain name infrastructure can piggy-back the public key and any necessary ssl options on the ip-address reply. the

Re: Hamiltonian path as protection against DOS.

2006-08-20 Thread Anne Lynn Wheeler
James A. Donald wrote: This is obviously the right way to do it - the current system has security and checking boundaries in the wrong place, as well as being unnecessarily verbose. Yet the plan never went anywhere. What happened? There is a gap between communications that are highly

NSA running out of electrical power

2006-08-20 Thread Steven M. Bellovin
There have been a number of news articles recently about server farms running into power crunches. NSA, as we all know, has lots of computers. They're running into a power crunch, too, according to http://www.baltimoresun.com/news/nationworld/bal-te.nsapower06aug06,0,5137448.story The story