Autodesk founder John Walker's "The Hacker's Diet" couples willpower with tools such as spreadsheets to engineer the weight away.

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Autodesk (nasdaq: ADSK - news - people ) founder John Walker's "The Hacker's Diet" couples willpower with tools such as spreadsheets to engineer the weight away.

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But patching the vulnerabilities used for mass infections of sites, which often use automated tools to spread malware among thousands of targets, is very different from patching every vulnerability a hacker could possibly use for a targeted attack on a single victim site.

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However, many of the tools available on the Internet are so easy to use that any computer novice can become a dangerous hacker, he said.

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