Attribute-based encryption (ABE) method with multiple tracing attribute authorities for cloud-assisted internet-of-things (IOT)
US12200110B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2022 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Apr 15, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An ABE method with multiple tracing attribute authorities: performing, by a central authority, system initialization to generate a public parameter and disclosing the public parameter; performing, by each of attribute authorities, initialization to generate a key pair, and disclosing a public key in the key pair; performing, by a data owner, symmetric encryption on plaintext data, performing ABE on a symmetric key based on a hidden access structure, and generating an integrity verification value; requesting, by a data user, a decryption key to the attribute authority according to an own attribute; restoring, by the data user in response to decryption, an access structure, generating an outsourcing decryption key, sending the outsourcing decryption key to a cloud storage center for semi-decryption; generating, by the cloud storage center, a semi-decrypted ciphertext, and feeding the semi-decrypted ciphertext back to the data user; fully decrypting the semi-decrypted ciphertext according to a private decryption key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.