Leaking Sensitive Information in Complex Document Files - and How to Prevent It
Garfinkel, Simson L.
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Complex document formats such as PDF and Microsoft’s Compound File Binary Format can contain information that is hidden but recoverable, as a result of text highlighting, cropping, or the embedding of high-resolution JPEG images. Private information can be released inadvertently if these fi les are distributed in electronic form. Simple experiments involving the creation of test documents can determine whether a particular program embeds hidden information.
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