Re: How to design a cryptographic "check" of a page's integrity using .NET?

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I googled for intrusion detection systems and got a list of IIS related ones:

http://www.windowsecurity.com/software/Intrusion-Detection/

-Brock
DevelopMentor
http://staff.develop.com/ballen



I have an idea for a way to help maintain my websites, and I'm hoping
someone can help me figure out how to implement it using C#, VB.NET,
or elements of the .NET framework. I'd be putting this on ASP.NET
pages.

There's always the possibility that webpages can a) get defaced, or b)
go offline for one reason or another.

I was thinking that there's probably some way to generate a unique key
based on the content of a page. My program would validate page
integrity by comparing the generated key to a previously generated
value. The easy and obvious answer would be to do a simple byte count
-- and that might be sufficient. Another easy answer is to do a
byte-for-byte comparison of an older content stream to the new. But
just for the sake of my curiousity and our learning, can someone
suggest a way that the content of the page could be analyzed to
generate a unique key?

Are there tools in the .NET framework to do this?

If I were to do this byte-for-byte comparison, is there anything more
advanced in .NETland than [if string x is identical to string Y then
return true]?

Thanks for any suggestions...




.

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