Signature device, verification device, signature method, verification method, and computer readable medium
US11888968B2 · kind B2 · utility
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3References
13Claims
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Key dates
| Filing date | Jul 22, 2021 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Jul 18, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3247
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signature device (30) acquires a signature key SK(x→) in which an attribute vector x→ is set over a basis B* of a basis B and the basis B*, which are dual bases in dual vector spaces. The signature device (30) generates a signature sig for a message MSG by setting predicate information of arithmetic branching programs (ABP) for the signature key SK(x→). The signature device (30) outputs the signature sig and the message MSG to a verification device (40).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.