US 2025/0181683 A1 · METHOD AND SYSTEM FOR PROCESSING DIGITAL CONTENT, METHOD AND SYSTEM FOR CONFIRMING COPYRIGHT OF DIGITAL CONTENT, AND METHOD AND SYSTEM FOR TRACING DIGITAL CONTENT

Abstract

A method for processing digital content includes: obtaining digital content; performing feature extraction on the digital content to obtain a digital content feature; generating an intermediate key based on at least the digital content feature and secret information of a user; binding at least the intermediate key to obtain an encryption key; and embedding a watermark of the digital content into the digital content based on the encryption key. When a key is submitted to a verifier, a pre-binding key may be provided alone. This avoids a risk of leakage of a key that is actually used for watermark embedding. When there is a large amount of media content, a user may locally store only secret information, without storing other intermediate keys or encryption keys. This reduces a local storage amount of the user.

Claims20

Dependent claims

A method for processing digital content, comprising:

obtaining digital content;
performing feature extraction on the digital content to obtain a digital content feature;
generating an intermediate key based on at least the digital content feature and secret information of a user;
binding at least the intermediate key to obtain an encryption key;
and
embedding a watermark of the digital content into the digital content based on the encryption key.

3 more elements

A computing device, comprising a memory and a processor, wherein the memory stores executable code, and the processor executes the executable code to implement operations of:

obtaining digital content;
performing feature extraction on the digital content to obtain a digital content feature;
generating an intermediate key based on at least the digital content feature and secret information of a user;
binding at least the intermediate key to obtain an encryption key;
and
embedding a watermark of the digital content into the digital content based on the encryption key.

3 more elements

A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to perform operations of:

obtaining digital content;
performing feature extraction on the digital content to obtain a digital content feature;
generating an intermediate key based on at least the digital content feature and secret information of a user;
binding at least the intermediate key to obtain an encryption key;
and
embedding a watermark of the digital content into the digital content based on the encryption key.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

19/045,350Filed 4 Feb 2025

Priority

CN 202210939019.75 Aug 2022

Published

5 Jun 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

G06F 21/16
Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]: program or…
G06F 21/1063
Enforcing content protection by specific content processing: personalisation
G09C 5/00
Ciphering apparatus or methods not provided for in the preceding groups
H04L 9/14
Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols: using a plurality of keys…

Method and system for processing digital content, method and system for confirming copyright of digital content, and method and system for tracing digital content

Life of this patent

Method and system for processing digital content, method and system for confirming copyright of digital content, and method and system for tracing digital content

Life of this patent

Abstract

Claims20