Patent · US Active

Secure data re-encryption

US10027640B2 · kind B2 · utility

3Cited by

8References

30Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Roberto Avanzi · Munich, DE
Rosario Cammarota · San Diego, US
Ron Keidar · Haifa, IL

Key dates

Filing date	Sep 22, 2015
Grant date	Jul 17, 2018
Priority date	—
Expiry date	Apr 4, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH04W4/70
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method includes: decrypting, in a device, a first subset of encrypted data using a cryptographic device key associated with the device to produce first plain text, where a set of encrypted data comprises the first subset of encrypted data and a second subset of encrypted data, and where the first subset of encrypted data and the second subset of encrypted data each contain less encrypted data than the set of encrypted data and are different from each other; decrypting, in the device, the second subset of encrypted data using the cryptographic device key to produce second plain text; encrypting, in the device, the first plain text using a first ephemeral key to produce first re-encrypted data; and encrypting, in the device, the second plain text using a second ephemeral key to produce second re-encrypted data, the second ephemeral key being different from the first ephemeral key.

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