Subscriber revocation in a publish-subscribe network using attribute-based encryption
US11804949B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2021 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Apr 9, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for subscriber revocation in a publish-subscribe network using attribute-based encryption (ABE) are disclosed, including: generating a tree data structure including leaf nodes representing subscribers, subtrees of the tree data structure representing subsets of subscribers having different likelihoods of ABE key revocation; generating ABE keys associated with edges in the tree data structure; assigning ABE keys to the leaf nodes, each leaf node being assigned a subset of the ABE keys associated with edges that form a path from a root node to the leaf node; based at least on a revocation record that indicates one or more revoked subscribers, determining a minimal subset of ABE keys that covers all non-revoked subscribers; and encrypting a payload using an encryption policy requiring at least one ABE key in the minimal subset of the ABE keys, to obtain a ciphertext that is not accessible to the one or more revoked subscribers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.