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About 34 mostly undisclosed companies were breached.

Now a leading computer forensic firm is providing the closest look so far at the nature of the attacks, and attackers, that struck Google and others. The report never mentions Google by name, or any other companies, but focuses on information gathered from hundreds of forensic investigations the firm has conducted that are identical to what we know about the Google hack.

What the information indicates is that the attack that hit Google is identical to publicly undisclosed attacks that have quietly plagued thousands of other U.S. companies and government agencies since 2002 and are rapidly growing. They represent a sea change from the kinds of attacks that have commonly hit networks and made headlines.

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