Broadcast encryption with improved resource utilization
US12388801B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jun 17, 2022 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Oct 7, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3093
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A broadcast network can use a pairing-based broadcast encryption scheme for N users with O(N1/3)-sized parameters. A pairing-based ciphertext-policy attribute-based encryption (CP-ABE) scheme for the class of degree 3 polynomials can be implemented with compact parameters. The public key, ciphertext and secret keys comprise O(n) group elements, where n is input length for the function. The constructions achieve adaptive security against unbounded collusions, and rely on the (bilateral) k-Lin assumption in prime-order bilinear groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.