A PDF document privacy leakage prevention method and system

Abstract

The invention provides a PDF document privacy leakage prevention method, which comprises the following steps: extracting metadata of the PDF document and checking whether the PDF document has passwordprotection through the metadata; if the document is not password protected, checking whether the document is file copy protected; if the document is not protected from file copying, an optional description in PDF auxiliary support is extracted from it; Filter out descriptive text and Internet links from optional descriptions, leaving only file paths; presenting a component of the metadata that may contain privacy information and the file path to a user; according to the user's selection, the components of the document that will disclose the privacy information are erased to generate a PDF document which does not contain the privacy information and does not destroy the original structure and content. The invention also provides a PDF document privacy leakage prevention system, which comprises a document sensitive component extraction module, a document sensitive component display module and a document privacy information erasing module.

Description

technical field [0001] The present invention relates to the field of computer network security, in particular to a defense method and system for privacy leakage of PDF documents. Background technique [0002] PDF (Portable Document Format) is a general-purpose document format launched by Adobe, which can integrate rich text, images, tables, links and other information into one file, and can be stable on various devices and operating systems. present content. Thanks to the flexibility and stability of PDF documents, it is widely used in multiple scenarios such as information transmission, knowledge exchange, and data archiving. It has also become a common medium for internal and external information exchange in government, business, education and other fields. [0003] PDF documents carry a large amount of data and information. In addition to the text content, there are also personal information such as the author's name, affiliation, and contact information left in it. Bec...

AI Technical Summary

Problems solved by technology

In the era of global information exchange and the wide application of big data technology, the information leaked from PDF documents is likely to be combined with information leaked from other sources, which will be used by criminals, causing more serious privacy leaks and endangering user information security.

As far as previous research is concerned, there are still possible ways of privacy leakage that have not been discovered, especially there is no easy-to-use system for ordinary users to discover and prevent privacy leakage of PDF documents

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