This is very good news.  I got a chance to speak to Keith once, and he’s definitely someone worth listening to on this subject.

Keith Brown has made avaiable an online version of his book, The .NET Developer's Guide to Windows Security.  You can browse the book for free, with a slightly modified title: A .NET Developer's Guide to Windows Security.  I haven't had time to look through the entire contents of this book yet, but it looks interesting, and I thought it was worth pointing out.

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[.Net Security Blog]