Robust selective image, video, and audio content authentication

Patent metadata

Field	Value
Publication number	US-2021287322-A1
Application number	US-202016924849-A
Country	US
Kind code	A1
Filing date	Jul 9, 2020
Priority date	Mar 10, 2020
Publication date	Sep 16, 2021
Grant date	—

Abstract

A method for processing a digital content includes acquiring content data using a sensor. Compressed reference data is generated from the acquired content data. A hash of the compressed reference data is generated using a hashing function. The generated hash is signed using an encryption function. The acquired content data is transmitted along with the compressed reference data and the signed hash.

First claim

What is claimed is:

1 . A method for processing a digital image, comprising:
acquiring image data using an image sensor; generating a compressed reference data from the acquired image data; generating a hash of the compressed reference data using a hashing function; signing the generated hash using an encryption function; and transmitting the acquired image data along with the compressed reference data and the signed hash.

2 . The method of claim 1 , wherein the generating of the compressed reference data, the generating of the hash, and the signing of the hash are performed by the image sensor.

3 . The method of claim 2 , wherein the image sensor is part of a digital camera device that further includes an application processor and the image data, compressed reference data, and signed hash are received by the application processor and the image data is processed by the application processor in accordance with software running thereon.

4 . The method of claim 3 , wherein the reference data is a first reference data, the compressed reference data is a first compressed reference data, and the application processor generates a second compressed reference data by concatenating second reference data obtained from one or more additional sensors, an additional scene, and/or user copyright data, generates a hash of the second compressed reference data, and signs the generated hash of the second compressed reference data to create a chain of authenticity.

5 . The method of claim 1 , further comprising:
receiving the image data along with the compressed reference data and the signed hash; decrypting the signed hash using a decryption function to generate a decrypted hash value; hashing the compressed reference data using the hashing function to generate a comparison hash value; comparing the decrypted hash value to the comparison hash value to authenticate the signed hash; and when the signed hash has been authenticated, comparing the image data to the compressed reference data to authenticate the image data.

6 . The method of claim 5 , wherein the encryption function utilizes a private key and the decryption function utilizes a public key associated with the private key.

7 . The method of claim 5 , wherein an authentication service compares the image data to the compressed reference data to authenticate the image data.

8 . The method of claim 7 , wherein the authentication service signs a result of its comparison to create a chain of authenticity.

9 . The method of claim 1 , further comprising:
receiving the go data along with the compressed reference data ant the signed editing the image data; and transmitting the edited image data along with the compressed reference data and the signed hash.

10 . The method of claim 9 , further comprising:
receiving the edited image data along with the compressed reference data and the signed hash; decrypting the signed hash using a decryption function to generate a decrypted hash value; hashing the compressed reference data using the hashing function to generate a comparison hash value; comparing the decrypted hash value to the comparison hash value to authenticate the signed hash; and when the signed hash has beery been authenticated, comparing the edited image data to the compressed reference data to assess an extent and position of the editing.

11 . A method for processing a digital image, comprising:
acquiring image data using an image sensor; splitting the acquired image data into a matrix of sub-images; generating a compressed reference data from each of the sub-images; generating a hash of each of the compressed reference data using a hashing function; signing each of the generated hash using an encryption function; and transmitting the acquired image data as the matrix of sub-images along with the compressed reference data and the signed hashes.

12 . The method of claim 11 , wherein the matrix of sub-images are at least partially overlapping with each other.

13 . The method of claim 11 , further comprising:
cropping the image data; deleting sub-images from the matrix of sub-images corresponding to a cropped section of the image data; and deleting the compressed reference data and the signed hashes that correspond to the deleted sub-images.

14 . The method of claim 13 , further comprising:
receiving the image data as the matrix of sub-images, without the deleted compressed reference data, along with the compressed reference data, without the deleted compressed reference data, and the signed hashes, without the deleted signed hashes; decrypting the signed hashes using a decryption function to generate decrypted hash values; hashing the compressed reference data using the hashing function to generate comparison hash values; comparing the decrypted hash values to the comparison hash values to authenticate the signed hashes; and when the signed hashes have been authenticated, comparing the image data to the compressed reference data to authenticate the image data.

15 . A method for processing a digital content, comprising:
acquiring content data using a sensor; dividing the acquired content into a plurality of frames; generating compressed reference content for each of the plurality of frames; generating a hash of the compressed reference content for each of the plurality of frames using a hashing function; signing each of the generated hashes using an encryption function; and transmitting the acquired content data along with the compressed reference data and the signed hashes.

16 . The method of claim 15 , wherein frame sequence numbers and/or unique scene IDs are appended to the compressed reference content.

17 . The method of claim 15 , wherein the sensor is an image sensor and the digital content is a digital image, video image, and/or audio content picked up by a microphone interfaced to the image sensor.

18 . The method of claim 15 , wherein the sensor is a microphone and the digital content is audio.

19 . The method of claim 15 , further comprising:
receiving the content data along with the compressed reference content and the signed hashes; decrypting the signed hashes using a decryption function to generate decrypted hash values; hashing the compressed reference content using the hashing function to generate comparison hash values; comparing the decrypted hash values to the comparison hash values to authenticate the signed hashes; and when the signed hashes have been authenticated, comparing the content data to the compressed reference content to authenticate the content data.

20 . The method of claim 15 , further comprising:
receiving the content data along with the compressed reference content and the signed hashes; editing the content data; and transmitting the edited content data along with the compressed reference content and the signed hashes.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Yaffe Yoel
• Orfaig Ariel
• Koltun Gershi
• Eisenberg Amit
• Goldin Ishay
• Litvak Shai

Classifications

• H04N21/4353

  involving decryption of additional data (arrangements using cryptography for the use of broadcast information or broadcast-related information H04H60/23) · CPC title

• H04N21/4405

  involving video stream decryption · CPC title

• H04N21/2347 Primary

  involving video stream encryption · CPC title

• H04N21/2389

  Multiplex stream processing, e.g. multiplex stream encrypting · CPC title

• H04N21/6334

  for authorisation, e.g. by transmitting a key {(wireless communications network key management H04W12/04; wireless communications network access security H04W12/08)} · CPC title