Method and system for secure information distribution based on group shared key
US11924178B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2021 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Sep 26, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a system and a method for information distribution. The system comprises: a server for generating a group key and its corresponding key deriving parameter, wherein the server encrypts sensitive contents by using the group key to obtain encrypted information; and terminals configured to receive the encrypted information through an open channel, extract the group key, then decrypt the encrypted information by using the group key to obtain the original content. In the group forming process, each terminal encrypts its private identifier using the public key and submits the ciphertext to the server. In information distribution process, the server transmits the ciphertext of sensitive contents and the key deriving parameter to the terminals via open channel Because private information available only to respective group members is required for calculating the group key, this mechanism ensures that the sensitive content can be transmitted securely on the open channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.