Identity-based encryption system for secure data distribution
US7003117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Feb 5, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system is provided that allows encrypted content to be distributed to users over a communications network. A policy enforcement service may use an identity-based encryption algorithm to generate public parameter information and private keys. Data content may be encrypted prior to distribution using an identity-based encryption engine. The encryption engine may use the public parameter information from the policy service and public key information to encrypt the data. The public key information may be based on policy information that specifies which types of users are allowed to access the data that is encrypted using that public key. A user may obtain a private key for unlocking particular encrypted data by providing a key request to the policy enforcement service that contains the public key. The policy enforcement service may enforce the policies given by the policy information and may provide private keys only to authorized users.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.