Method and device for safety control and source-tracing tracking of paper document

Abstract

The invention relates to a method and device for safety control and source-tracing tracking of a paper document. The method comprises the steps that (1) a client side inserts watermark information in the printed and output paper document by a printing control module; (2) when the printed paper document is copied, copying user identity authentication will be conducted by a copy control module, a user obtains scanning image data of the paper document after passing the identity authentication, the watermark information inserted into the paper document is extracted in real time, and then legality of a copy operation behavior is judged; (3) when the copy operation behavior of the paper document is judged to be legal, the watermark information will be inserted into the copied and output paper document once again; and (4) the copied and output paper document is converted into digital image data by digital equipment, and a watermark information extraction and recognition program is conducted for a document source-tracing tracking operation. According to the invention, technical puzzles in safety control output, source-tracking tracking of secrete divulgence and so forth during whole processes of paper document printing and copying can be solved uniformly.

Description

technical field [0001] The invention belongs to the technical field of paper document protection, and relates to a method and device for security control output and traceability of paper documents, in particular to a method and device for document printing and copy output security control, traceability and tracking. Background technique [0002] With the development of e-commerce and e-government, enterprises, institutions, party and government agencies, and national security departments will deal with a large amount of written materials, including important documents such as contracts and secrets. Therefore, it is an important issue to study the copyright protection and content security of the above important text files. In addition, many text files not only exist in digital form, but also spread in paper form through printing, copying and other means. With the rapid development of digital technology, this method has become quite common, which also makes a lot of important...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for security control and traceability of paper documents, which are used to solve the irregular approval process in the document copying process in the prior art, the inability to save snapshots of copied content, and the inability to re-embed watermark information in copied content, etc. Shortcomings, to further unify technical problems such as the security control output and traceability of the whole process of paper document printing and copying documents

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