A method and system for preventing privacy leakage of pdf documents

Abstract

The present invention provides a method for preventing privacy leakage of a PDF document, which includes the following steps: extracting metadata of the PDF document, and checking whether it has password protection through the metadata; if the document has no password protection, checking whether it has file copy protection; if If the document has no file copy protection, extract the optional description in the PDF auxiliary support; filter out the descriptive text and Internet links in the optional description, and only keep the file path; use the components that may contain private information in the above metadata And the above file path is presented to the user; according to the user's choice, the components that will leak the private information in the document are erased, and a PDF document that does not contain private information and does not destroy the original structure and content is generated. The present invention also provides a PDF document privacy leakage defense system, which includes a document sensitive component extraction module, a document sensitive component display module and a document private information erasure 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

Images