Patent · US Active

Method, computer program, and data processing circuitry for access control to encrypted data using attributes of the data

US12299158B2 · kind B2 · utility

0Cited by

3References

13Claims

0Family size

Assignee

SONY GROUP CORPORATION · JP

Inventors

Dimitri Torfs · Winksele, BE
Alexandru SERBANATI · Stuttgart, DE
Michele Minelli · Zaventem, BE

Key dates

Filing date	Jun 23, 2021
Grant date	May 13, 2025
Priority date	—
Expiry date	Jan 12, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/60
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method for sharing encrypted data including encrypting first data with at least one first attribute. The first attribute satisfies a first access policy of a first cryptographic key to enable one or more first users holding the first cryptographic key to decrypt the encrypted first data using the first cryptographic key. The method includes encrypting second data with at least one second attribute of the second data. The method includes generating a second cryptographic key based on a second access policy including at least one logical connective of the first attribute and the second attribute for decrypting the encrypted first data and the encrypted second data using the second cryptographic key and providing the second cryptographic key to one or more second users to enable the second users to decrypt the encrypted first data and the encrypted second data.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.