You can protect the contents of a ZIP file, but unless you know the trick, you might as well not bother.

That question can be interpreted two ways. Do you want to hack into someone else’s private files? Or do you want to avoid a form of encryption that won’t give you much protection? Since I believe that most PCWorld readers are inherently good people, I’ll assume that you simply want to be assured that your files will not be cracked.
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