Digital signature server and user terminal
US8887153B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2009 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Nov 22, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0457
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To reduce a load on a user terminal imposed when verifying signature data and at the same time reduce a load on a server, a signature key matrix KM includes a plurality of signature keys Ki-j arranged in a matrix structure of m rows and n columns, and is stored in a signature key matrix database 21. A correspondence relationship between a signature key set CK which is an aggregate of any signature keys selected from the n columns respectively and a user terminal 30 is stored in a correspondence relationship information database 22. A signature data generating unit 24 generates signature data having a matrix structure by encrypting a content digest D generated based on content data C by n number of signature keys included in the signature key matrix KM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.