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Model anti-collusion watermark

A technology for watermarking and watermark embedding, which is applied in image watermarking, image data processing, user identity/authority verification, etc., and can solve problems such as failure to establish

Active Publication Date: 2017-08-29
SONY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this may not be true for sequence-key-like watermarking strategies that generally don't support long payloads

Method used

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  • Model anti-collusion watermark
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  • Model anti-collusion watermark

Examples

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Embodiment Construction

[0020] As noted above, forensic marking facilitates the identification of compromised devices or collections of compromised devices. However, subjects can collude to erase embedded / watermarked information in content or point to another subject. Anti-collusion schemes, such as Tardos codes, allow detection of two or more colluders. As noted above, the main problem with Tardos codes is that they require payload lengths of hundreds or thousands of bits, which may not be suitable for sequence key-like watermarking strategies.

[0021] Certain implementations as disclosed herein teach techniques for anti-collusion / defector tracking systems using robust anti-collusion methods. In one implementation, a group of potential colluding subjects is identified by a common model number in the content's payload. In other implementations, the positions of individual bits of the payload are permuted. After reading this specification it will become apparent how to implement the disclosure in ...

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Abstract

The invention relates to a model anti-collusion watermark. Embedding a watermark payload in content includes: a counter configured to store a random seed; a permutation generator configured to receive and process the watermark payload and the random seed, and generate a shuffled payload based on the random seed; and a watermark embedder configured to receive and embed the shuffled payload into the content. Key words include watermark payload and collusion.

Description

technical field [0001] This disclosure relates to digital watermarking, and more specifically, to anti-collusion watermarking. Background technique [0002] The purpose of the forensic mark is to facilitate the identification of the audiovisual source of the leak. Therefore, forensic tokens can assist other investigative tools. Its purpose is to discover compromised devices or collections of compromised devices, or infringing viewers. [0003] One known attack is known as collusion. Two or more colluding subjects somehow mix their individually watermarked content with the expectation that the attack erases the embedded information or points to another subject. [0004] One commonly proposed solution is to use anti-collusion-enabled payloads. They are often referred to as Tardos codes, and many researchers follow the principles of the Tardos codes. Tardos codes allow high probability detection of collusion of two or more colluders. [0005] The main problem with Tardos ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/16
CPCG06T1/005H04L9/32G06T2201/0063G09C5/00H04L2209/34H04L2209/606G06T1/0021
Inventor E·迪赫尔
Owner SONY CORP