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I am putting together a security presentation, and I would like statistics on the occurrence of and damages from security breaches. Does anyone know of a reliable, recently-updated source?

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See also which asks for statistics that were particular to MITM attacks. – Jeff Ferland Jan 13 '13 at 4:04
You'll probably find the Symantec threat report helpful: – LamonteCristo Jan 13 '13 at 5:08
@makerofthings7 The Symantec report is clear, well-organized and didn't require me to register for anything. Thanks! – Sean W. Jan 18 '13 at 21:02 - truly opensource and not marketing-driven data.

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The sources they get the data from (state governments) are open, but one must request permission to use their compiled data and charts. Too bat it's not under a Creative Commons license. – Sean W. Jan 18 '13 at 19:46

I'll add to this as I check for relevancy.

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I did a presentation on the exact same thing last year. I found to be a good source.

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