On the Internet, How Do You Know If You Are Talking to a Dog?

The famous 1993 cartoon from The New Yorker has the caption “On the Internet, nobody knows you’re a dog.” The question at the moment is: when you’re on the internet, how do you know you are not talking to a dog? When you ask to connect to a remote service, you expect to connect to that remote service. You probably don’t even think about the possibility that “myspace.com” might not be “myspace.com”. But what if you couldn’t rely on that? How about “mybank.com”? Believe it or not, you may exist in such a world today. Last week, US-CERT issued a “Vulnerability Note” on Multiple DNS implementations vulnerable to cache poisoning. What does that mean? Read on…

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