>> 1. Vernon apparently got offended because I pointed out that he >> didn't realize that MD5 checksum on IPv4 was easily breakable via >> dictionary attack or that his use of it went his often public stated >> condescending policy of "do not implement half-solutions". And the applicable "Kook" rule from Mr. Schryver's bible that started this thread is: http://www1.ietf.org/mail-archive/ietf/Current/msg22092.html "you are deeply offended when people do not agree that you have found the UFPSTTSP" Which Mr. Schryver conveniently removed from his web site version (wonder why?): http://www.rhyolite.com/anti-spam/you-might-be.html >Perhaps Mr. Moore should recall my claim to archive mail. >He wrote this: Perhaps Mr. Schryver should recall my claim to archive mail. The point I made in #1 above is that Mr. Schryver had apparently never considered the question until I asked it. And then when I pointed out to him he got very offended, which violates one of his own rules for being a "Kook": I wrote: >> Yes that is why I wondered why you bothered to hash the IP at all. >> I think this is case where you voilated your own principle of not >> implementing "half solutions". There is no security or privacy benefit >> to hashing the IPs (because a brute force dictionary attack can be >> built in 100 hours) and there would be benefits to not hashing them >> such as my algorithm. Now I have to carry around a 16 GB dictionary >> (lookup table). He responded: > >I doubt you have figured out how we thought the IP address might be used. I responded: What you thought is irrelevant to facts at hand. The fact is the IPs can be reasonably extracted thus logically it is reasonably useless to hash them. >>} So if you had 1% of that space, or 40 million IPs in your databases >>} over time, then would take approx. 20 million minutes = 333,000 >>} hours = 15,000 days < 50 years to convert all MD5 back to IPv4s. > >I never did figure out what Mr. Moore meant by 15,000 days. He >could not have been thinking of doing on average 2 billion MD5 hashes Can you read? I wrote "1% of the space". >for each of 4 billion IPv4 addresses, because that would have been >silly and would have take more than 15,000 days. > > >Ok, I'll stop feeding the troll now. I will stop feeding the troll by posting in this thread now. I predict he or his buddies won't stop posting in this thread. Shelby Moore http://AntiViotic.com