Hierarchical attribute-based encryption and decryption
US10211984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2012 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Apr 8, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A domain authority 13 for use in a hierarchy of domain authorities in a hierarchical cryptographic system. The domain authority 13 comprises a user secret key generator 21 for generating a user secret key based on a domain secret key and one or more attribute representations, to obtain a user secret key associated with a set of attributes corresponding to the attribute representations, and wherein the domain secret key is based on a domain secret key of a parent domain authority or a root secret key of a root authority of the hierarchy of domain authorities, and wherein the attribute representations are independent of the hierarchy. A decrypter makes use of the user secret key. An encrypter generates ciphertext decryptable by the decrypter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.