US 2025/0094546 A1Published application

Watermarking digital media for content verification with differential detection

AssigneeTrufo Inc.

InventorsYan Huang, Xinyi Han, Jiaxin Guan

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Abstract

The present disclosure provides a method of watermarking digital media for subsequent decoding. The method includes receiving a secure content package comprising digital audiovisual content, source entity information, content annotations, and digital signatures. The package is validated using public-key cryptography. A content identifier is generated and embedded as a watermark into the digital audiovisual content. The watermark is configured to be machine readable and visually inconspicuous. A content database entry is recorded in a remote database, retrievable using the content identifier and comprising the content annotations and source information. The watermarked digital audiovisual content is stored and transmitted to the media source. The method may further include generating and storing content hashes for future authentication comparisons.

Claims30

Dependent claims

A computer-implemented method of authenticating digital content, comprising:

(a) receiving, by one or more processors, data representing an observed item of digital content;
(b) receiving, by the one or more processors, information comprising a differential hash associated with an original version of said observed item of digital content;
(c) computing, by the one or more processors, a differential hash of said observed item of digital content, wherein the method of computation comprises:
(i) determining a plurality of spatial regions of said observed item of digital content,
(ii) applying a numerical function to each spatial region of the plurality of spatial regions, wherein the numerical function is a computational operation that takes content data from a spatial region as input and produces a numerical output that characterizes or represents that region in a way suitable for subsequent comparison and analysis;
(iii) quantizing respective outputs of the numerical functions to generate quantized outputs, and
(iv) concatenating the quantized outputs into a final hash;
(d) comparing, by the one or more processors, said received differential hash and said computed differential hash by identifying locations at which they differ;
(e) identifying, by the one or more processors, spatial regions of the observed item of digital content that exhibit differences exceeding a predetermined threshold or spatial regions that exhibit differences below said predetermined threshold versus the original version by analyzing a result of said comparing;
(f) generating, by the one or more processors, information comprising said identification of spatial regions;
and
(g) storing, in a non-transitory computer-readable medium, the information comprising said identification of spatial regions.

9 more elements

A system for authenticating digital content, comprising:

(a) one or more processors;
and
(b) a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the system to perform operations comprising:
(i) receiving data representing an observed item of digital content;
(ii) receiving information comprising a differential hash associated with an original version of said observed item of digital content;
(iii) computing a differential hash of said observed item of digital content, wherein the method of computation comprises:
(i) determining a plurality of spatial regions of said observed item of digital content,
(ii) applying a numerical function to each spatial region of the plurality of spatial regions, wherein the numerical function is a computational operation that takes content data from a spatial region as input and produces a numerical output that characterizes or represents that region in a way suitable for subsequent comparison and analysis;
(iii) quantizing respective outputs of the numerical functions to generate quantized outputs, and
(iv) concatenating the quantized outputs into a final hash;
(iv) comparing said received differential hash and said computed differential hash by identifying locations at which they differ;
(v) identifying spatial regions of the observed item of digital content that exhibit differences exceeding a predetermined threshold or spatial regions that exhibit differences below said predetermined threshold versus the original version by analyzing a result of said comparing;
(vi) generating information comprising said identification of spatial regions;
and
(vii) storing the information comprising said identification of spatial regions.

12 more elements

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to perform operations for authenticating digital content, the operations comprising:

(a) receiving data representing an observed item of digital content;
(b) receiving information comprising a differential hash associated with an original version of said observed item of digital content;
(c) computing a differential hash of said observed item of digital content, wherein the method of computation comprises:
(i) determining a plurality of spatial regions of said observed item of digital content,
(ii) applying a numerical function to each spatial region of the plurality of spatial regions, wherein the numerical function is a computational operation that takes content data from a spatial region as input and produces a numerical output that characterizes or represents that region in a way suitable for subsequent comparison and analysis;
(iii) quantizing respective outputs of the numerical functions to generate quantized outputs, and
(iv) concatenating the quantized outputs into a final hash;
(d) comparing said received differential hash and said computed differential hash by identifying locations at which they differ;
(e) identifying spatial regions of the observed item of digital content that exhibit differences exceeding a predetermined threshold or spatial regions that exhibit differences below said predetermined threshold versus the original version by analyzing a result of said comparing;
(f) generating information comprising said identification of spatial regions;
and
(g) storing the information comprising said identification of spatial regions.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/966,712Filed 3 Dec 2024
Priority: 21 Jul 2023
Published: 20 Mar 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G06F 21/16
Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]: program or…
H04L 63/12
Network architectures or network communication protocols for network security: applying verification of the received information
H04L 9/0643
The encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions;…
H04L 9/3247
Including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity…:…

Family

Application63/514,800Us provisional application · filed 21 Jul 2023
Application63/586,407Us provisional application · filed 28 Sep 2023
Application63/600,029Us provisional application · filed 16 Nov 2023
Application63/555,889Us provisional application · filed 20 Feb 2024
Application18/779,858Continuation · filed 22 Jul 2024
Application18/966,712Continuation
US 12,158,929 B1Related patent
US 12,688,264 B2Related patent
US 2025/0094546 A1This patent

From the US filing history. Foreign family members aren’t listed.

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