Watermark information writing method and device and watermark information reading method and device

A technology for watermarking information and fields, applied in the field of data processing, can solve the problem that the watermark field cannot be used directly

Pending Publication Date: 2019-08-09
BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The watermark field of the former is easier to be identified, while the value of the watermark field of the latter cannot be used directly. It is necessary to use a specific application programming interface to decrypt and remove the watermark information. The watermark of the two methods is relatively easy to be perceived by the user.

Method used

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  • Watermark information writing method and device and watermark information reading method and device
  • Watermark information writing method and device and watermark information reading method and device
  • Watermark information writing method and device and watermark information reading method and device

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Embodiment Construction

[0058] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

[0059] figure 1 A flowchart showing a method for writing watermark information according to an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0060] S11. Select at least two fields from the original data according to a predetermined selection strategy;

[0061] S12. Determine an arrangement sequence corresponding to the watermark information;

[0062] S13. Sorting the selected at least two fields according to the sorting order.

[0063]It should be noted that the sorting operation in step S13 is only for the selected fields in the original data, and the other fie...

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PUM

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Abstract

The embodiment of the invention provides a watermark information writing method and device and a watermark information reading method and device, wherein the watermark information writing method comprises the steps of selecting at least two fields from the original data according to a predetermined selection strategy; determining an arrangement sequence corresponding to the watermark information;and sorting the selected at least two fields according to the sorting order. The watermark information is coded by using the field sequence, and no additional field is newly added, so that the user isnot perceived.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a method and device for writing watermark information and a method and device for reading watermark information. Background technique [0002] Existing watermarking techniques include: adding an additional watermark field, using the encryption of this field to identify a certain user; or adding a watermark value in a specific field, encoding a digital watermark in this value, thereby identifying a certain user. The watermark field of the former is easier to be identified, and the value of the watermark field of the latter cannot be used directly, and a specific application programming interface needs to be used to decrypt and remove the watermark information. The watermark of the two methods is relatively easy to be perceived by the user. Contents of the invention [0003] Embodiments of the present invention provide a watermark information writing method and device, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/14G06F21/62
CPCG06F21/14G06F21/6227
Inventor 林向东段雪涛马鑫云朱晓阳吴钟刚宋银龙
Owner BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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